Revert "Enable -Wshadow by default for the "chromium code" config."

This reverts commit 4bc6f71377.

Reason for revert: [Sheriff] most likely to have caused tree failure just now

Original change's description:
> Enable -Wshadow by default for the "chromium code" config.
>
> Bug: 794619
> Change-Id: Ic125a2da8692ba63479d260d3712ed75d7a7cd9f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3202306
> Auto-Submit: Peter Kasting <pkasting@chromium.org>
> Reviewed-by: Dirk Pranke <dpranke@google.com>
> Commit-Queue: Peter Kasting <pkasting@chromium.org>
> Owners-Override: Scott Violet <sky@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#940761}

TBR=sky@chromium.org,pkasting@chromium.org,dpranke@google.com,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: I507152afeadaf7c8d66822a30e9d94858aaecb91
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 794619
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3275779
Reviewed-by: Kamila Hasanbega <hkamila@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Owners-Override: Liviu Tinta <liviutinta@chromium.org>
Owners-Override: Kamila Hasanbega <hkamila@google.com>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/main@{#940767}

base/BUILD.gn

@@ -1351,6 +1351,7 @@ component("base") {
     ":base_implementation",
     ":memory_tagging",
     "//build/config:precompiled_headers",
+    "//build/config/compiler:noshadowing",
     "//build/config/compiler:wglobal_constructors",
   ]
 
@@ -3736,7 +3737,10 @@ test("base_unittests") {
     ]
   }
 
-  configs += [ ":memory_tagging" ]
+  configs += [
+    ":memory_tagging",
+    "//build/config/compiler:noshadowing",
+  ]
 }
 
 action("build_date") {

build/config/compiler/BUILD.gn

@@ -1649,10 +1649,7 @@ config("chromium_code") {
     }
   }
 
-  configs = [
-    ":default_warnings",
-    ":noshadowing",
-  ]
+  configs = [ ":default_warnings" ]
 }
 
 config("no_chromium_code") {

cc/cc.gni

@@ -7,6 +7,7 @@ import("//testing/test.gni")
 cc_remove_configs = []
 cc_add_configs = [
   "//build/config:precompiled_headers",
+  "//build/config/compiler:noshadowing",
   "//build/config/compiler:wexit_time_destructors",
 ]
 

components/android_system_error_page/BUILD.gn

@@ -10,6 +10,10 @@ static_library("android_system_error_page") {
     "error_page_populator.h",
   ]
 
+  configs += [
+    "//build/config/compiler:noshadowing",
+  ]
+
   deps = [
     "//base",
     "//base:i18n",

components/exo/wayland/compatibility_test/BUILD.gn

@@ -58,12 +58,6 @@ wayland_protocol_codegen("generated_client_event_receiver_version_tests") {
       "$target_gen_dir/all_generated_client_event_receiver_version_tests.cc"
 }
 
-config("generated_code_warnings") {
-  if (is_clang) {
-    cflags = [ "-Wno-shadow" ]
-  }
-}
-
 source_set("compatibility_test") {
   testonly = true
 
@@ -105,6 +99,4 @@ source_set("compatibility_test") {
     "//third_party/wayland-protocols:vsync_feedback_protocol",
     "//third_party/wayland-protocols:xdg_shell_protocol",
   ]
-
-  configs += [ ":generated_code_warnings" ]
 }

components/url_formatter/BUILD.gn

@@ -29,6 +29,8 @@ static_library("url_formatter") {
     "url_formatter.h",
   ]
 
+  configs += [ "//build/config/compiler:noshadowing" ]
+
   deps = [
     "//base",
     "//base:i18n",

content/BUILD.gn

@@ -9,7 +9,10 @@ import("//tools/grit/grit_rule.gni")
 # Applied by targets internal to content.
 config("content_implementation") {
   defines = [ "CONTENT_IMPLEMENTATION" ]
-  configs = [ "//build/config/compiler:wexit_time_destructors" ]
+  configs = [
+    "//build/config/compiler:noshadowing",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 }
 
 assert(!is_ios, "Chromium/iOS shouldn't use anything in //content")

gpu/BUILD.gn

@@ -12,27 +12,42 @@ import("//ui/gl/features.gni")
 
 config("gpu_implementation") {
   defines = [ "GPU_IMPLEMENTATION" ]
-  configs = [ "//build/config/compiler:wexit_time_destructors" ]
+  configs = [
+    "//build/config/compiler:noshadowing",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 }
 
 config("gpu_gles2_implementation") {
   defines = [ "GPU_GLES2_IMPLEMENTATION" ]
-  configs = [ "//build/config/compiler:wexit_time_destructors" ]
+  configs = [
+    "//build/config/compiler:noshadowing",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 }
 
 config("gpu_util_implementation") {
   defines = [ "GPU_UTIL_IMPLEMENTATION" ]
-  configs = [ "//build/config/compiler:wexit_time_destructors" ]
+  configs = [
+    "//build/config/compiler:noshadowing",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 }
 
 config("raster_implementation") {
   defines = [ "RASTER_IMPLEMENTATION" ]
-  configs = [ "//build/config/compiler:wexit_time_destructors" ]
+  configs = [
+    "//build/config/compiler:noshadowing",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 }
 
 config("webgpu_implementation") {
   defines = [ "WEBGPU_IMPLEMENTATION" ]
-  configs = [ "//build/config/compiler:wexit_time_destructors" ]
+  configs = [
+    "//build/config/compiler:noshadowing",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 }
 
 component("gpu") {

mojo/core/BUILD.gn

@@ -177,6 +177,7 @@ template("core_impl_source_set") {
       defines += [ "MOJO_CORE_LEGACY_PROTOCOL" ]
     }
 
+    configs += [ "//build/config/compiler:noshadowing" ]
     if (!is_debug && !optimize_for_size) {
       configs -= [ "//build/config/compiler:default_optimization" ]
       configs += [ "//build/config/compiler:optimize_max" ]

net/third_party/quiche/BUILD.gn

@@ -14,8 +14,6 @@ config("quiche_config") {
     "src/common/platform/default",
     "src",
   ]
-
-  cflags = [ "-Wno-shadow" ]
 }
 
 # Since //net and //net/third_party/quiche have a circular dependency on each

pdf/BUILD.gn

@@ -21,8 +21,15 @@ buildflag_header("buildflags") {
 }
 
 if (enable_pdf) {
+  config("common") {
+    configs = [ "//build/config/compiler:noshadowing" ]
+  }
+
   config("strict") {
-    configs = [ "//build/config/compiler:wexit_time_destructors" ]
+    configs = [
+      ":common",
+      "//build/config/compiler:wexit_time_destructors",
+    ]
   }
 
   config("pdfium_includes") {
@@ -218,6 +225,8 @@ if (enable_pdf) {
       "ppapi_migration/ppapi_assert_matching_enums.cc",
     ]
 
+    configs += [ ":common" ]
+
     deps = [
       ":accessibility",
       ":internal",
@@ -395,6 +404,8 @@ if (enable_pdf) {
       "test/test_pdfium_engine.h",
     ]
 
+    configs += [ ":common" ]
+
     deps = [
       ":internal",
       ":ppapi_migration",
@@ -457,6 +468,8 @@ if (enable_pdf) {
       "ui/thumbnail_unittest.cc",
     ]
 
+    configs += [ ":common" ]
+
     data = [ "test/data/" ]
 
     deps = [

printing/BUILD.gn

@@ -52,6 +52,7 @@ component("printing_base") {
     public_configs = [ ":cups" ]
   }
 
+  configs += [ "//build/config/compiler:noshadowing" ]
   cflags = []
   defines = [ "IS_PRINTING_BASE_IMPL" ]
 
@@ -106,6 +107,7 @@ component("metafile") {
     "metafile_skia.h",
   ]
 
+  configs += [ "//build/config/compiler:noshadowing" ]
   defines = [ "IS_PRINTING_METAFILE_IMPL" ]
   public_deps = [
     ":native_drawing_context",
@@ -161,6 +163,7 @@ component("printing") {
     "pwg_raster_settings.h",
   ]
 
+  configs += [ "//build/config/compiler:noshadowing" ]
   cflags = []
   defines = [ "IS_PRINTING_IMPL" ]
 
@@ -274,6 +277,7 @@ static_library("test_support") {
     "test_printing_context.h",
   ]
 
+  configs += [ "//build/config/compiler:noshadowing" ]
   public_deps = [
     "//printing",
     "//printing/backend:test_support",
@@ -318,6 +322,7 @@ test("printing_unittests") {
     "units_unittest.cc",
   ]
 
+  configs += [ "//build/config/compiler:noshadowing" ]
   deps = [
     ":printing",
     ":test_support",

printing/backend/BUILD.gn

@@ -33,6 +33,7 @@ component("backend") {
   ]
 
   public_configs = []
+  configs += [ "//build/config/compiler:noshadowing" ]
   cflags = []
   defines = [ "IS_PRINT_BACKEND_IMPL" ]
 
@@ -150,6 +151,7 @@ source_set("test_support") {
     "test_print_backend.h",
   ]
 
+  configs += [ "//build/config/compiler:noshadowing" ]
   deps = [
     ":backend",
     "//base",

third_party/blink/common/BUILD.gn

@@ -62,7 +62,10 @@ source_set("common") {
     "//third_party/blink/public/common",
   ]
 
-  configs += [ ":blink_common_implementation" ]
+  configs += [
+    ":blink_common_implementation",
+    "//build/config/compiler:noshadowing",
+  ]
 
   sources = [
     # NOTE: Please do not add public headers that need to be referenced from

third_party/blink/renderer/BUILD.gn

@@ -50,6 +50,8 @@ config("inside_blink") {
       "-Wno-implicit-int-conversion",
     ]
   }
+
+  configs = [ "//build/config/compiler:noshadowing" ]
 }
 
 # blink_pch --------------------------------------------------------------------
@@ -134,4 +136,6 @@ config("non_test_config") {
   if (is_clang) {
     cflags += [ "-Wglobal-constructors" ]
   }
+
+  configs = [ "//build/config/compiler:noshadowing" ]
 }

third_party/blink/renderer/controller/BUILD.gn

@@ -31,6 +31,7 @@ component("controller") {
   }
 
   configs += [
+    "//build/config/compiler:noshadowing",
     "//build/config/compiler:wexit_time_destructors",
     "//third_party/blink/renderer:config",
     "//third_party/blink/renderer:inside_blink",

third_party/blink/renderer/core/BUILD.gn

@@ -133,7 +133,10 @@ config("blink_core_pch") {
   }
 }
 
-core_config_add += [ ":blink_core_pch" ]
+core_config_add += [
+  ":blink_core_pch",
+  "//build/config/compiler:noshadowing",
+]
 
 source_set("core_common") {
   sources = [ "core_export.h" ]

third_party/blink/renderer/core/animation/BUILD.gn

@@ -19,6 +19,8 @@ buildflag_header("buildflags") {
 }
 
 blink_core_sources("animation") {
+  configs += [ "//build/config/compiler:noshadowing" ]
+
   sources = [
     "animatable.cc",
     "animatable.h",

third_party/blink/renderer/core/exported/BUILD.gn

@@ -19,6 +19,8 @@ static_library("test_support") {
 }
 
 blink_core_sources("exported") {
+  configs += [ "//build/config/compiler:noshadowing" ]
+
   sources = [
     "web_array_buffer.cc",
     "web_array_buffer_converter.cc",

third_party/blink/renderer/core/probe/BUILD.gn

@@ -36,6 +36,8 @@ source_set("generated") {
 
 # Compiles the sources generated above.
 blink_core_sources("probe") {
+  configs += [ "//build/config/compiler:noshadowing" ]
+
   sources = [
     "async_task_id.h",
     "core_probes.cc",

third_party/blink/renderer/platform/BUILD.gn

@@ -131,6 +131,7 @@ config("blink_platform_config") {
   configs = [
     "//third_party/blink/renderer:config",
     "//third_party/blink/renderer:inside_blink",
+    "//build/config/compiler:noshadowing",
   ]
 }
 

third_party/blink/renderer/platform/wtf/BUILD.gn

@@ -36,6 +36,8 @@ config("wtf_config") {
 }
 
 component("wtf") {
+  configs += [ "//build/config/compiler:noshadowing" ]
+
   sources = [
     "allocator/allocator.cc",
     "allocator/allocator.h",

third_party/nearby/BUILD.gn

@@ -457,8 +457,6 @@ source_set("platform_impl_shared_file") {
     ":platform_public_types",
     "//third_party/abseil-cpp:absl",
   ]
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
 }
 
 # src/cpp/platform/public

ui/aura/BUILD.gn

@@ -173,6 +173,8 @@ component("aura") {
     public += [ "screen_ozone.h" ]
     sources += [ "screen_ozone.cc" ]
   }
+
+  configs += [ "//build/config/compiler:noshadowing" ]
 }
 
 static_library("test_support") {

ui/gfx/BUILD.gn

@@ -270,6 +270,7 @@ component("gfx") {
 
   configs += [
     "//build/config:precompiled_headers",
+    "//build/config/compiler:noshadowing",
     "//build/config/compiler:wexit_time_destructors",
   ]
 

ui/gfx/animation/keyframe/BUILD.gn

@@ -7,6 +7,7 @@ import("//build/config/ui.gni")
 keyframe_animation_remove_configs = []
 keyframe_animation_add_configs = [
   "//build/config:precompiled_headers",
+  "//build/config/compiler:noshadowing",
   "//build/config/compiler:wexit_time_destructors",
 ]
 

ui/gfx/x/BUILD.gn

@@ -19,8 +19,6 @@ config("x11_private_config") {
 
 config("build_xprotos_config") {
   cflags = [
-    "-Wno-shadow",
-
     # Generated proto files pull all fields from a struct into scope
     # even if they aren't used.  Rather than adding logic in the
     # generator to determine which fields are used and keeping only

ui/views/BUILD.gn

@@ -496,7 +496,10 @@ component("views") {
   ]
 
   sources += get_target_outputs(":views_vector_icons")
-  configs += [ "//build/config:precompiled_headers" ]
+  configs += [
+    "//build/config:precompiled_headers",
+    "//build/config/compiler:noshadowing",
+  ]
   defines = [ "VIEWS_IMPLEMENTATION" ]
 
   deps = [