Refactor Blink's ServiceConnector and add ability to mock in layout tests

third_party/WebKit/public/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/buildflag_header.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 83 matching lines @@
       "//third_party/android_tools:android_support_annotations_java",
     ]
     srcjar_deps = [ ":blink_headers_java_enums_srcjar" ]
   }
 }
 
 # Depend on this target to use public blink API headers for things like enums
 # and public structures without actually linking against any Blink libraries.
 source_set("blink_headers") {
   sources = [
+    "platform/Connector.h",
     "platform/FilePathConversion.h",
     "platform/InterfaceProvider.h",
     "platform/Platform.h",
     "platform/URLConversion.h",
     "platform/UserMetricsAction.h",
     "platform/WebAddressSpace.h",
     "platform/WebApiKeyValidator.h",
     "platform/WebApplicationCacheHost.h",
     "platform/WebApplicationCacheHostClient.h",
     "platform/WebAudioBus.h",
@@ skipping 636 matching lines @@
 source_set("shared_typemap_traits") {
   visibility = [ ":*" ]
   sources = [
     "web/ConsoleMessageStructTraits.cpp",
     "web/WindowFeaturesStructTraits.cpp",
   ]
   deps = [
     ":mojo_bindings_shared__generator",
   ]
 }