Introduce cc StructTraits unit tests

cc/cc_tests.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,
     'cc_unit_tests_source_files': [
       'animation/animation_host_unittest.cc',
       'animation/animation_player_unittest.cc',
@@ skipping 320 matching lines @@
     {
       'target_name': 'cc_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:test_support_base',
         '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
         '../gpu/gpu.gyp:gpu',
         '../gpu/gpu.gyp:gpu_unittest_utils',
         '../ipc/ipc.gyp:ipc',
         '../media/media.gyp:media',
+        '../mojo/mojo_edk.gyp:mojo_common_test_support',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/protobuf/protobuf.gyp:protobuf_lite',
         '../ui/events/events.gyp:events_base',
         '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         'cc.gyp:cc',
         'cc.gyp:cc_proto',
         'cc.gyp:cc_surfaces',
@@ skipping 168 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }