Add blink::ServiceRegistry and expose it from LocalFrame and Platform.

content/renderer/renderer_blink_platform_impl.cc

Index: content/renderer/renderer_blink_platform_impl.cc
diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc
index 88df4251a5e960afc6c4cd5db7ba20a0e350496c..60714b70adb9ca9a8071b60f0174c78893ca47e8 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -68,6 +68,7 @@
 #include "content/renderer/media/renderer_webaudiodevice_impl.h"
 #include "content/renderer/media/renderer_webmidiaccessor_impl.h"
 #include "content/renderer/media/rtc_certificate_generator.h"
+#include "content/renderer/mojo/blink_service_registry_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_clipboard_delegate.h"
 #include "content/renderer/screen_orientation/screen_orientation_observer.h"
@@ -237,7 +238,8 @@ class RendererBlinkPlatformImpl::SandboxSupport
 //------------------------------------------------------------------------------
 
 RendererBlinkPlatformImpl::RendererBlinkPlatformImpl(
-    scheduler::RendererScheduler* renderer_scheduler)
+    scheduler::RendererScheduler* renderer_scheduler,
+    base::WeakPtr<ServiceRegistry> service_registry)
     : BlinkPlatformImpl(renderer_scheduler->DefaultTaskRunner()),
       main_thread_(renderer_scheduler->CreateMainThread()),
       clipboard_delegate_(new RendererClipboardDelegate),
@@ -248,7 +250,8 @@ RendererBlinkPlatformImpl::RendererBlinkPlatformImpl(
       default_task_runner_(renderer_scheduler->DefaultTaskRunner()),
       loading_task_runner_(renderer_scheduler->LoadingTaskRunner()),
       web_scrollbar_behavior_(new WebScrollbarBehaviorImpl),
-      renderer_scheduler_(renderer_scheduler) {
+      renderer_scheduler_(renderer_scheduler),
+      blink_service_registry_(new BlinkServiceRegistryImpl(service_registry)) {
 #if !defined(OS_ANDROID) && !defined(OS_WIN)
   if (g_sandbox_enabled && sandboxEnabled()) {
     sandbox_support_.reset(new RendererBlinkPlatformImpl::SandboxSupport);
@@ -1205,11 +1208,8 @@ void RendererBlinkPlatformImpl::SetPlatformEventObserverForTesting(
   platform_event_observers_.AddWithID(observer.release(), type);
 }
 
-void RendererBlinkPlatformImpl::connectToRemoteService(
-    const char* name,
-    mojo::ScopedMessagePipeHandle handle) {
-  RenderThread::Get()->GetServiceRegistry()->ConnectToRemoteService(
-      name, std::move(handle));
+blink::ServiceRegistry* RendererBlinkPlatformImpl::serviceRegistry() {
+  return blink_service_registry_.get();
 }
 
 void RendererBlinkPlatformImpl::startListening(