Allow Blink to generate cc::FrameSinkId from RenderThread

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 e038d2bc1108721538e3841aff4aa289a18a7e2b..52833e73da674b786ee493910225635821b30784 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -618,6 +618,14 @@ WebString RendererBlinkPlatformImpl::databaseCreateOriginIdentifier(
       WebSecurityOriginToGURL(origin)));
 }
 
+uint32_t RendererBlinkPlatformImpl::getClientId() {
+  return RenderThread::Get()->GetClientId();
+}
+
+int RendererBlinkPlatformImpl::generateRoutingId() {
+  return RenderThread::Get()->GenerateRoutingID();
+}
+
 bool RendererBlinkPlatformImpl::isThreadedCompositingEnabled() {
   RenderThreadImpl* thread = RenderThreadImpl::current();
   // thread can be NULL in tests.