Change FrameTreeNode id from int64 to int.

content/browser/frame_host/navigator_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/browser/frame_host/navigator_impl.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 546 matching lines @@
     bool user_gesture) {
   GURL dest_url(url);
   SiteInstance* current_site_instance =
       GetRenderManager(render_frame_host)->current_frame_host()->
           GetSiteInstance();
   if (!GetContentClient()->browser()->ShouldAllowOpenURL(
           current_site_instance, url)) {
     dest_url = GURL(url::kAboutBlankURL);
   }
 
-  int64 frame_tree_node_id = -1;
+  int frame_tree_node_id = -1;
 
   // Send the navigation to the current FrameTreeNode if it's destined for a
   // subframe in the current tab.  We'll assume it's for the main frame
   // (possibly of a new or different WebContents) otherwise.
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kSitePerProcess) &&
       disposition == CURRENT_TAB &&
       render_frame_host->GetParent()) {
     frame_tree_node_id =
         render_frame_host->frame_tree_node()->frame_tree_node_id();
@@ skipping 316 matching lines @@
         "Navigation.TimeToCommit_ExistingRenderer_BeforeUnloadDiscounted",
         time_to_commit);
     UMA_HISTOGRAM_TIMES(
         "Navigation.TimeToURLJobStart_ExistingRenderer_BeforeUnloadDiscounted",
         time_to_network);
   }
   navigation_data_.reset();
 }
 
 }  // namespace content