Adds a way to determine id of content handler that created app

content/renderer/render_frame_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 519 matching lines @@
 
 bool IsReload(FrameMsg_Navigate_Type::Value navigation_type) {
   return navigation_type == FrameMsg_Navigate_Type::RELOAD ||
          navigation_type == FrameMsg_Navigate_Type::RELOAD_IGNORING_CACHE ||
          navigation_type == FrameMsg_Navigate_Type::RELOAD_ORIGINAL_REQUEST_URL;
 }
 
 RenderFrameImpl::CreateRenderFrameImplFunction g_create_render_frame_impl =
     nullptr;
 
+void OnGotContentHandlerID(uint32_t content_handler_id) {}
+
 }  // namespace
 
 // static
 RenderFrameImpl* RenderFrameImpl::Create(RenderViewImpl* render_view,
                                          int32 routing_id) {
   DCHECK(routing_id != MSG_ROUTING_NONE);
   CreateParams params(render_view, routing_id);
 
   if (g_create_render_frame_impl)
     return g_create_render_frame_impl(params);
@@ skipping 4558 matching lines @@
 }
 
 mojo::ServiceProviderPtr RenderFrameImpl::ConnectToApplication(
     const GURL& url) {
   if (!mojo_shell_)
     GetServiceRegistry()->ConnectToRemoteService(mojo::GetProxy(&mojo_shell_));
   mojo::ServiceProviderPtr service_provider;
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From(url);
   mojo_shell_->ConnectToApplication(request.Pass(), GetProxy(&service_provider),
-                                    nullptr, nullptr);
+                                    nullptr, nullptr,
+                                    base::Bind(&OnGotContentHandlerID));
   return service_provider.Pass();
 }
 
 }  // namespace content