Record UMA stats for subframes history navigations.

content/browser/frame_host/navigator.cc

 // Copyright 2014 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/browser/frame_host/navigator.h"
 
 #include "base/time/time.h"
 #include "content/common/resource_request_body_impl.h"
 #include "content/public/browser/stream_handle.h"
 
 namespace content {
 
 NavigatorDelegate* Navigator::GetDelegate() {
   return nullptr;
 }
 
 NavigationController* Navigator::GetController() {
   return NULL;
 }
 
 bool Navigator::NavigateToPendingEntry(FrameTreeNode* frame_tree_node,
                                        const FrameNavigationEntry& frame_entry,
                                        ReloadType reload_type,
                                        bool is_same_document_history_load) {
   return false;
 }
 
-bool Navigator::NavigateNewChildFrame(RenderFrameHostImpl* render_frame_host) {
+bool Navigator::NavigateNewChildFrame(RenderFrameHostImpl* render_frame_host,
+                                      const GURL& default_url) {
   return false;
 }
 
 base::TimeTicks Navigator::GetCurrentLoadStart() {
   return base::TimeTicks::Now();
 }
 
 void Navigator::OnBeginNavigation(FrameTreeNode* frame_tree_node,
                                   const CommonNavigationParams& common_params,
                                   const BeginNavigationParams& begin_params) {}
 
 NavigationHandleImpl* Navigator::GetNavigationHandleForFrameHost(
     RenderFrameHostImpl* render_frame_host) {
   return nullptr;
 }
 
 }  // namespace content