Start work on adding content/browser to GN build.

content/renderer/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/renderer/renderer.gni")
 
 source_set("renderer") {
   # Only targets in the content tree can depend directly on this target.
   visibility = [ "//content/*" ]
 
   sources = rebase_path(content_renderer_gypi_values.private_renderer_sources,
                         ".", "//content")
 
   configs += [
-    "//content:blink_headers_stub_config",
     "//content:content_implementation",
     "//content:libjingle_stub_config",
     "//content:v8_stub_config",
     "//content:widevine_stub_config",
   ]
 
   deps = [
     # TODO(GYP) bug 376846 remove this. This should be inherited from //net but
     # those don't cross component boundaries.
     "//crypto:platform",
 
     "//base/allocator",
     "//content:resources",
     "//content/common:mojo_bindings",
     "//gin",
     "//mojo/public/js/bindings",
     "//mojo/public/interfaces/service_provider",
     "//net",
     "//skia",
     "//third_party/icu",
     "//third_party/npapi",
+    "//third_party/WebKit/public:blink_headers",
     "//ui/accessibility",
     "//ui/events:dom4_keycode_converter",
     "//ui/native_theme",
     "//ui/surface",
     # TODO(GYP)
     #'../jingle/jingle.gyp:jingle_glue',
     #'../media/media.gyp:media',
     #'../mojo/mojo.gyp:mojo_environment_chromium',
     #'../third_party/WebKit/public/blink.gyp:blink',
     #'../third_party/libjingle/libjingle.gyp:libjingle',
@@ skipping 124 matching lines @@
         ".", "//content")
   }
 
   if (!enable_pepper_cdms) {
     sources -= [
       "renderer/media/crypto/ppapi_decryptor.cc",
       "renderer/media/crypto/ppapi_decryptor.h",
     ]
   }
 }