[webengine] Prevent use of ENABLE_CAST_RECEIVER in more code

Move the exclusion added in https://crrev.com/c/3956572 up to
//fuchsia_web.

Bug: 1329657
Change-Id: I913809008bb3e06f3b35a00873b24f741488d2b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4004177
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Auto-Submit: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1067277}

fuchsia_web/DEPS

@@ -1,4 +1,8 @@
 include_rules = [
+  # //build is allowed by default, but most code should not vary based on
+  # ENABLE_CAST_RECEIVER. This is especially true for CastRunner.
+  "-build/chromecast_buildflags.h",
+
   # Require explicit include rules for sub-directories.
   "-fuchsia_web",
 

fuchsia_web/runners/cast/DEPS

@@ -1,8 +1,4 @@
 include_rules = [
-  # CastRunner builds do not vary based on ENABLE_CAST_RECEIVER except in one
-  # way (see below).
-  "-build/chromecast_buildflags.h",
-
   "+components/cast",
   "+content/public/test",
   "+fuchsia_web/cast_streaming",

fuchsia_web/webengine/DEPS

@@ -1,5 +1,9 @@
 include_rules = [
   # Do NOT add components/cast or other Cast-specific code to this file.
+
+  # WebEngine varies based on ENABLE_CAST_RECEIVER.
+  "+build/chromecast_buildflags.h",
+
   "+components/embedder_support",
   "+components/fuchsia_component_support",
   "+components/media_control",

fuchsia_web/webinstance_host/DEPS

@@ -18,6 +18,9 @@ include_rules = [
 
 specific_include_rules = {
   "web_instance_host\.cc": [
+    # Some functionality depends on ENABLE_CAST_RECEIVER.
+    "+build/chromecast_buildflags.h",
+
     "+third_party/widevine/cdm/buildflags.h",
   ],
   "web_instance_host_integration_test\.cc": [