Add missing dependencies to the GN build.

The need for these dependencies was shaken out by the (local, so far) addition
of public_configs to //mojo/public targets that need to be propagated
throughout the build.

Review URL: https://codereview.chromium.org/742053002

Cr-Commit-Position: refs/heads/master@{#305194}

chrome/common/extensions/api/BUILD.gn

@@ -21,6 +21,10 @@ json_schema_api("api_registration") {
   bundle_registration = true
 
   deps = [
+    # Different APIs include headers from these targets.
+    "//content/public/browser",
+    "//extensions/browser",
+
     # Different APIs include some headers from chrome/common that in turn
     # include generated headers from these targets.
     # TODO(brettw) this should be made unnecessary if possible.

content/child/BUILD.gn

@@ -15,6 +15,10 @@ source_set("child") {
   sources = rebase_path(content_child_gypi_values.private_child_sources,
                         ".", "//content")
 
+  public_deps = [
+    "//mojo/edk/system",
+  ]
+
   deps = [
     "//base",
     "//components/tracing",

content/gpu/BUILD.gn

@@ -25,6 +25,7 @@ source_set("gpu") {
   deps = [
     "//base",
     "//content:export",
+    "//content/public/child:child_sources",
     "//mojo/public/interfaces/application",
     "//skia",
     "//ui/gl",

content/public/browser/BUILD.gn

@@ -43,6 +43,7 @@ source_set("browser_sources") {
   public_deps = [
     # We expose skia headers in the public API.
     "//skia",
+    "//mojo/public/cpp/system",
   ]
   deps = [
     "//content/browser",

content/public/child/BUILD.gn

@@ -23,8 +23,11 @@ source_set("child_sources") {
     "//content:content_implementation",
   ]
 
-  deps = [
+  public_deps = [
     "//content/child",
+  ]
+
+  deps = [
     "//content/public/common:common_sources",
   ]
 }

content/public/common/BUILD.gn

@@ -27,6 +27,7 @@ source_set("common_sources") {
 
   public_deps = [
     "//content/common",
+    "//mojo/public/cpp/bindings",
   ]
   deps = [
     "//net",

device/serial/BUILD.gn

@@ -45,7 +45,7 @@ static_library("serial") {
     configs += [ "//build/config/linux:udev" ]
   }
 
-  deps = [
+  public_deps = [
     ":serial_mojo",
   ]
 }