Change FrameTreeNode id from int64 to int.

content/browser/frame_host/frame_accessibility.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/frame_accessibility.h"
 
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/render_frame_host_delegate.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
@@ skipping 12 matching lines @@
       child_frame_tree_node_id(0),
       browser_plugin_instance_id(0) {}
 
 FrameAccessibility::FrameAccessibility() {}
 
 FrameAccessibility::~FrameAccessibility() {}
 
 void FrameAccessibility::AddChildFrame(
     RenderFrameHostImpl* parent_frame_host,
     int accessibility_node_id,
-    int64 child_frame_tree_node_id) {
+    int child_frame_tree_node_id) {
   for (std::vector<ChildFrameMapping>::iterator iter = mappings_.begin();
        iter != mappings_.end();
        ++iter) {
     // TODO(dmazzoni): the renderer should keep track of these mappings
     // and clear an existing mapping before setting a new one, that would
     // be safer than just updating existing mappings. http://crbug.com/413464
     if (iter->parent_frame_host == parent_frame_host &&
         (iter->accessibility_node_id == accessibility_node_id ||
          iter->child_frame_tree_node_id == child_frame_tree_node_id)) {
       iter->accessibility_node_id = accessibility_node_id;
@@ skipping 153 matching lines @@
         return true;
       }
     }
   }
 
   return false;
 }
 
 RenderFrameHostImpl* FrameAccessibility::GetRFHIFromFrameTreeNodeId(
     RenderFrameHostImpl* parent_frame_host,
-    int64 child_frame_tree_node_id) {
+    int child_frame_tree_node_id) {
   FrameTreeNode* child_node =
       FrameTreeNode::GloballyFindByID(child_frame_tree_node_id);
   if (!child_node)
     return nullptr;
 
   // Assert that the child node is a descendant of the parent frame in
   // the frame tree. It may not be a direct descendant because the
   // parent frame's accessibility tree may span multiple frames from the
   // same origin.
   FrameTreeNode* parent_node = parent_frame_host->frame_tree_node();
   FrameTreeNode* child_node_ancestor = child_node->parent();
   while (child_node_ancestor && child_node_ancestor != parent_node)
     child_node_ancestor = child_node_ancestor->parent();
   if (child_node_ancestor != parent_node) {
     NOTREACHED();
     return nullptr;
   }
 
   return child_node->current_frame_host();
 }
 
 }  // namespace content