Pass Surface ID namespace to renderer compositors.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 94d484f72ed7a922a2fe850a9a5bd2611ff70e1c..db48f70a37889ba162941cb505d626f707faa043 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -749,6 +749,7 @@ bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
     IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScreenRects, OnUpdateScreenRects)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetSurfaceIdNamespace, OnSetSurfaceIdNamespace)
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(ViewMsg_ShowImeIfNeeded, OnShowImeIfNeeded)
     IPC_MESSAGE_HANDLER(ViewMsg_ImeEventAck, OnImeEventAck)
@@ -1749,6 +1750,11 @@ void RenderWidget::OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
   Send(new ViewHostMsg_UpdateScreenRects_ACK(routing_id()));
 }
 
+void RenderWidget::OnSetSurfaceIdNamespace(uint32_t surface_id_namespace) {
+  if (compositor_)
+    compositor_->SetSurfaceIdNamespace(surface_id_namespace);
+}
+
 void RenderWidget::showImeIfNeeded() {
   OnShowImeIfNeeded();
 }