cc: Abstract out proxy timing history

cc/cc.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 422 matching lines @@
         'trees/layer_tree_host_impl.cc',
         'trees/layer_tree_host_impl.h',
         'trees/layer_tree_impl.cc',
         'trees/layer_tree_impl.h',
         'trees/layer_tree_settings.cc',
         'trees/layer_tree_settings.h',
         'trees/occlusion_tracker.cc',
         'trees/occlusion_tracker.h',
         'trees/proxy.cc',
         'trees/proxy.h',
+        'trees/proxy_timing_history.cc',
+        'trees/proxy_timing_history.h',
         'trees/quad_culler.cc',
         'trees/quad_culler.h',
         'trees/single_thread_proxy.cc',
         'trees/single_thread_proxy.h',
         'trees/thread_proxy.cc',
         'trees/thread_proxy.h',
         'trees/tree_synchronizer.cc',
         'trees/tree_synchronizer.h',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
@@ skipping 18 matching lines @@
         'surfaces/surface.h',
         'surfaces/surface_aggregator.cc',
         'surfaces/surface_aggregator.h',
         'surfaces/surface_manager.cc',
         'surfaces/surface_manager.h',
         'surfaces/surfaces_export.h',
       ],
     },
   ],
 }