gpu: Add a class MeasurementTimers that measures wall, cpu and gpu time.

gpu/gpu.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': {
     'nacl_win64_target': 0,
   },
   'includes': [
     'gpu_common.gypi',
@@ skipping 275 matching lines @@
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
         '../testing/gtest.gyp:gtest',
         '../testing/perf/perf_test.gyp:perf_test',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         '../ui/gl/gl.gyp:gl',
       ],
       'sources': [
+        'perftests/measurements.cc',
         'perftests/run_all_tests.cc',
         'perftests/texture_upload_perftest.cc',
       ],
     },
     {
       # GN version: //gpu:gl_tests
       'target_name': 'gl_tests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 396 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'gpu_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }