Fix message routing for BrowserPlugin in iframe

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 ca73b8c6fc57f2ebfcba7dc65a6425be7306cc70..2c6dcddf44dd0742eabed0a2586e41c1b70b1099 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -81,6 +81,7 @@ class AecDumpMessageFilter;
 class AudioInputMessageFilter;
 class AudioMessageFilter;
 class AudioRendererMixerManager;
+class BrowserPluginManager;
 class CompositorForwardingMessageFilter;
 class ContextProviderCommandBuffer;
 class DBMessageFilter;
@@ -275,6 +276,10 @@ class CONTENT_EXPORT RenderThreadImpl
   blink::WebMediaStreamCenter* CreateMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client);
 
+  BrowserPluginManager* browser_plugin_manager() const {
+    return browser_plugin_manager_.get();
+  }
+
 #if defined(ENABLE_WEBRTC)
   // Returns a factory used for creating RTC PeerConnection objects.
   PeerConnectionDependencyFactory* GetPeerConnectionDependencyFactory();
@@ -478,6 +483,8 @@ class CONTENT_EXPORT RenderThreadImpl
   scoped_refptr<DevToolsAgentFilter> devtools_agent_message_filter_;
   scoped_ptr<V8SamplingProfiler> v8_sampling_profiler_;
 
+  scoped_ptr<BrowserPluginManager> browser_plugin_manager_;
+
 #if defined(ENABLE_WEBRTC)
   scoped_ptr<PeerConnectionDependencyFactory> peer_connection_factory_;