Pass Surface ID namespace to renderer compositors.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 0923657632c9eabcf91d2ec323cdbfeb7373cac5..db3079e2e314febb4fdac00a7858aa20a58205aa 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -322,6 +322,13 @@ void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
     view_weak_.reset();
   view_ = view;
 
+  // If the renderer has not yet been initialized, then the surface ID
+  // namespace will be sent during initialization.
+  if (view_ && renderer_initialized_) {
+    Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
+                                           view_->GetSurfaceIdNamespace()));
+  }
+
   GpuSurfaceTracker::Get()->SetSurfaceHandle(
       surface_id_, GetCompositingSurface());
 
@@ -416,6 +423,13 @@ void RenderWidgetHostImpl::Init() {
   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
   GetProcess()->ResumeRequestsForView(routing_id_);
 
+  // If the RWHV has not yet been set, the surface ID namespace will get
+  // passed down by the call to SetView().
+  if (view_) {
+    Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
+                                           view_->GetSurfaceIdNamespace()));
+  }
+
   WasResized();
 }