Support multiple files for AEC dump.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index 32e342dcdbdc80fe0f9859948cc5dcfe8ca29772..2728626246e884bb12101ca5c409831f63675df7 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -324,8 +324,14 @@ class CONTENT_EXPORT RenderProcessHostImpl
   virtual void OnGpuSwitching() OVERRIDE;
 
 #if defined(ENABLE_WEBRTC)
+  void OnRegisterAecDumpConsumer(int id);
+  void OnUnregisterAecDumpConsumer(int id);
+  void RegisterAecDumpConsumerOnUIThread(int id);
+  void UnregisterAecDumpConsumerOnUIThread(int id);
+  void EnableAecDumpForId(const base::FilePath& file, int id);
   // Sends |file_for_transit| to the render process.
-  void SendAecDumpFileToRenderer(IPC::PlatformFileForTransit file_for_transit);
+  void SendAecDumpFileToRenderer(int id,
+                                 IPC::PlatformFileForTransit file_for_transit);
   void SendDisableAecDumpToRenderer();
 #endif
 
@@ -444,6 +450,9 @@ class CONTENT_EXPORT RenderProcessHostImpl
 
   scoped_refptr<P2PSocketDispatcherHost> p2p_socket_dispatcher_host_;
 
+  // Must be accessed on UI thread.
+  std::vector<int> aec_dump_consumers_;
+
   WebRtcStopRtpDumpCallback stop_rtp_dump_callback_;
 #endif