Added the RenderView routing_id to the DidCommitProvisionalLoad message.

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 1b83f26eabab76e1695a9dc870a8f7a2f260aae0..7a651efff601942d317e280592815401639e47ee 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -151,6 +151,16 @@ IPC_STRUCT_BEGIN_WITH_PARENT(FrameHostMsg_DidCommitProvisionalLoad_Params,
   // Notifies the browser that for this navigation, the session history was
   // successfully cleared.
   IPC_STRUCT_MEMBER(bool, history_list_was_cleared)
+
+  // The routing_id of the render view associated with the navigation.
+  // We need to track the RenderViewHost routing_id because of downstream
+  // dependencies (crbug.com/392171 DownloadRequestHandle, SaveFileManager,
+  // ResourceDispatcherHostImpl, MediaStreamUIProxy,
+  // SpeechRecognitionDispatcherHost and possibly others). They look up the view
+  // based on the ID stored in the resource requests. Once those dependencies
+  // are unwound or moved to RenderFrameHost (crbug.com/304341) we can move the
+  // client to be based on the routing_id of the RenderFrameHost.
+  IPC_STRUCT_MEMBER(int, render_view_routing_id)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(FrameMsg_Navigate_Params)