IPC messages and changes to ResourceLoaderBridge to support resource loading for media

chrome/browser/renderer_host/resource_message_filter.h

Index: chrome/browser/renderer_host/resource_message_filter.h
diff --git a/chrome/browser/renderer_host/resource_message_filter.h b/chrome/browser/renderer_host/resource_message_filter.h
index 10a12ed9743e3acfadde144fdfc63e33c13219c0..3269c89cf0aea6bbf514ef346edecafd0301c30d 100644
--- a/chrome/browser/renderer_host/resource_message_filter.h
+++ b/chrome/browser/renderer_host/resource_message_filter.h
@@ -101,6 +101,7 @@ class ResourceMessageFilter : public IPC::ChannelProxy::MessageFilter,
   void OnCancelRequest(int request_id);
   void OnClosePageACK(int new_render_process_host_id, int new_request_id);
   void OnDataReceivedACK(int request_id);
+  void OnDownloadProgressACK(int request_id);
   void OnUploadProgressACK(int request_id);
   void OnSyncLoad(int request_id,
                   const ViewHostMsg_Resource_Request& request,
@@ -251,6 +252,9 @@ class ResourceMessageFilter : public IPC::ChannelProxy::MessageFilter,
   // Contextual information to be used for requests created here.
   scoped_refptr<URLRequestContext> request_context_;
 
+  // A request context specific for media resources.
+  scoped_refptr<URLRequestContext> media_request_context_;
+
   // A pointer to the profile associated with this filter.
   //
   // DANGER! Do not dereference this pointer! This class lives on the I/O thread