Move ViewHostMsg_CreateWindow to mojom

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 5051bdf019778bab30064b6b0497aad6e1255829..12125f7a879fa8417b19f7eac0500f576a138249 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -163,6 +163,10 @@ class CONTENT_EXPORT RenderThreadImpl
       std::unique_ptr<base::MessageLoop> main_message_loop,
       std::unique_ptr<blink::scheduler::RendererScheduler> renderer_scheduler);
   static RenderThreadImpl* current();
+  static mojom::RenderMessageFilter* current_render_message_filter();
+
+  static void SetRenderMessageFilterForTesting(
+      mojom::RenderMessageFilter* render_message_filter);
 
   ~RenderThreadImpl() override;
   void Shutdown() override;