Start work on adding content/browser to GN build.

content/common/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/common/common.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 source_set("common") {
   # Only targets in the content tree can depend directly on this target.
   visibility = [ "//content/*" ]
 
   sources = rebase_path(content_common_gypi_values.private_common_sources,
                         ".", "//content")
 
   forward_dependent_configs_from = [
-    # TODO(GYP) convert these dependencies.
-    #"//third_party/WebKit/public:blink_headers",
+    "//gpu/command_buffer/common",
+    "//third_party/WebKit/public:blink_headers",
   ]
 
   configs += [
-    "//content:blink_headers_stub_config",
     "//content:content_implementation",
     "//content:libjingle_stub_config",
   ]
 
   deps = [
     "//base",
     "//build/util:webkit_version",
     "//components/tracing",
     "//gpu/command_buffer/common",
     "//net",
     "//skia",
     "//third_party/icu",
     "//ui/accessibility",
     "//ui/base:ui_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//url",
+    "//third_party/WebKit/public:blink_headers",
     # TODO(GYP) convert these dependencies.
-    #"//third_party/WebKit/public:blink_headers",
     #'../third_party/libjingle/libjingle.gyp:libjingle',
     #'../ui/shell_dialogs/shell_dialogs.gyp:shell_dialogs',
   ]
 
   if (!is_ios) {
     deps += [
       "//ipc",
       "//gpu/command_buffer/client:gles2_c_lib",
       "//gpu/command_buffer/client:gles2_implementation",
       "//ui/gl",
@@ skipping 208 matching lines @@
       ]
     }
   }
 }
 
 mojom("mojo_bindings") {
   sources = [
     "web_ui_setup.mojom",
   ]
 }