Change FrameTreeNode id from int64 to int.

content/browser/frame_host/frame_tree_unittest.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/frame_tree.h"
 
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/frame_host/navigator_impl.h"
 #include "content/browser/frame_host/render_frame_host_factory.h"
@@ skipping 310 matching lines @@
   FrameTreeNode* root = contents()->GetFrameTree()->root();
 
   main_test_rfh()->OnCreateChildFrame(22, std::string(), SandboxFlags::NONE);
   main_test_rfh()->OnCreateChildFrame(23, std::string(), SandboxFlags::NONE);
 
   // Add one grandchild frame.
   RenderFrameHostImpl* child1_rfh = root->child_at(0)->current_frame_host();
   child1_rfh->OnCreateChildFrame(33, std::string(), SandboxFlags::NONE);
 
   // Ensure they can be found by id.
-  int64 id1 = root->child_at(0)->frame_tree_node_id();
-  int64 id2 = root->child_at(1)->frame_tree_node_id();
-  int64 id3 = root->child_at(0)->child_at(0)->frame_tree_node_id();
+  int id1 = root->child_at(0)->frame_tree_node_id();
+  int id2 = root->child_at(1)->frame_tree_node_id();
+  int id3 = root->child_at(0)->child_at(0)->frame_tree_node_id();
   EXPECT_TRUE(FrameTreeNode::GloballyFindByID(id1));
   EXPECT_TRUE(FrameTreeNode::GloballyFindByID(id2));
   EXPECT_TRUE(FrameTreeNode::GloballyFindByID(id3));
 
   // Crash the renderer.
   main_test_rfh()->GetProcess()->SimulateCrash();
 
   // Ensure they cannot be found by id after the process has crashed.
   EXPECT_FALSE(FrameTreeNode::GloballyFindByID(id1));
   EXPECT_FALSE(FrameTreeNode::GloballyFindByID(id2));
   EXPECT_FALSE(FrameTreeNode::GloballyFindByID(id3));
 }
 
 }  // namespace content