Service CreateNewWindow on the UI thread with a new mojo interface

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index b46d2dcd0377518c11582c04d63a184ea882a831..6a1c7f7851d2c44583e08f904c4e0c07f4101ecd 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -171,9 +171,12 @@ class CONTENT_EXPORT RenderThreadImpl
       std::unique_ptr<blink::scheduler::RendererScheduler> renderer_scheduler);
   static RenderThreadImpl* current();
   static mojom::RenderMessageFilter* current_render_message_filter();
+  static mojom::RenderMessageFilterUI* current_render_message_filter_ui();
 
   static void SetRenderMessageFilterForTesting(
       mojom::RenderMessageFilter* render_message_filter);
+  static void SetRenderMessageFilterUIForTesting(
+      mojom::RenderMessageFilterUI* render_message_filter_ui);
 
   ~RenderThreadImpl() override;
   void Shutdown() override;
@@ -367,6 +370,7 @@ class CONTENT_EXPORT RenderThreadImpl
   }
 
   mojom::RenderFrameMessageFilter* render_frame_message_filter();
+  mojom::RenderMessageFilterUI* render_message_filter_ui();
   mojom::RenderMessageFilter* render_message_filter();
 
   // Get the GPU channel. Returns NULL if the channel is not established or
@@ -781,6 +785,7 @@ class CONTENT_EXPORT RenderThreadImpl
 
   mojom::RenderFrameMessageFilterAssociatedPtr render_frame_message_filter_;
   mojom::RenderMessageFilterAssociatedPtr render_message_filter_;
+  mojom::RenderMessageFilterUIAssociatedPtr render_message_filter_ui_;
 
   base::CancelableClosure record_purge_suspend_metric_closure_;
   RendererMemoryMetrics purge_and_suspend_memory_metrics_;