[UMA] Use proper C++ objects to serialize tracked_objects across process boundaries.

chrome/chrome_tests.gypi

 # 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1753 matching lines @@
         'browser/tab_contents/render_view_context_menu_unittest.cc',
         'browser/tab_contents/thumbnail_generator_unittest.cc',
         'browser/tabs/pinned_tab_codec_unittest.cc',
         'browser/tabs/pinned_tab_service_unittest.cc',
         'browser/tabs/pinned_tab_test_utils.cc',
         'browser/tabs/tab_strip_model_unittest.cc',
         'browser/tabs/tab_strip_selection_model_unittest.cc',
         'browser/tabs/test_tab_strip_model_delegate.cc',
         'browser/tabs/test_tab_strip_model_delegate.h',
         'browser/task_manager/task_manager_unittest.cc',
+        'browser/task_profiler/task_profiler_data_serializer_unittest.cc',
         'browser/themes/browser_theme_pack_unittest.cc',
         'browser/themes/theme_service_unittest.cc',
         'browser/ui/browser_list_unittest.cc',
         'browser/ui/browser_unittest.cc',
         # It is safe to list */cocoa/* files in the "common" file list
         # without an explicit exclusion since gyp is smart enough to
         # exclude them from non-Mac builds.
         'browser/ui/cocoa/about_ipc_controller_unittest.mm',
         'browser/ui/cocoa/about_window_controller_unittest.mm',
         'browser/ui/cocoa/accelerators_cocoa_unittest.mm',
@@ skipping 2805 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }