Make SpeechRecognition per RenderFrame instead of per RenderView.

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 0b8b72b7a7884d3a220e595ecb4358e571c52e42..be0cc4a972935597bf496d9f1d73b9ab6f252e39 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -183,11 +183,11 @@ IPC_STRUCT_BEGIN_WITH_PARENT(FrameHostMsg_DidCommitProvisionalLoad_Params,
   // 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.
+  // ResourceDispatcherHostImpl, MediaStreamUIProxy, 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)
 
   // Origin of the frame.  This will be replicated to any associated