Use LatencyInfoSwapPromise to track LatencyInfo through compositor

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 40 matching lines @@
         'animation/scrollbar_animation_controller_thinning.h',
         'animation/timing_function.cc',
         'animation/timing_function.h',
         'animation/transform_operation.cc',
         'animation/transform_operation.h',
         'animation/transform_operations.cc',
         'animation/transform_operations.h',
         'base/completion_event.h',
         'base/invalidation_region.cc',
         'base/invalidation_region.h',
+        'base/latency_info_swap_promise.cc',
+        'base/latency_info_swap_promise.h',
         'base/math_util.cc',
         'base/math_util.h',
         'base/ref_counted_managed.h',
         'base/region.cc',
         'base/region.h',
         'base/scoped_ptr_algorithm.h',
         'base/scoped_ptr_deque.h',
         'base/scoped_ptr_vector.h',
         'base/swap_promise.h',
         'base/switches.cc',
@@ skipping 363 matching lines @@
         '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.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }