Add platform_app flag to manifest.

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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' : {
     # Variables for js2gtest rules
     'gypv8sh': '../tools/gypv8sh.py',
     'js2gtest': 'test/base/js2gtest.js',
     'js2gtest_out_dir': '<(SHARED_INTERMEDIATE_DIR)/js2gtest',
     'mock_js': 'third_party/mock4js/mock4js.js',
@@ skipping 184 matching lines @@
         'test/base/chrome_render_view_host_test_harness.cc',
         'test/base/chrome_render_view_host_test_harness.h',
         'test/base/chrome_test_suite.cc',
         'test/base/chrome_test_suite.h',
         'test/base/in_process_browser_test.cc',
         'test/base/in_process_browser_test.h',
         'test/base/model_test_utils.cc',
         'test/base/model_test_utils.h',
         'test/base/profile_mock.cc',
         'test/base/profile_mock.h',
+        'test/base/scoped_command_line_override.cc',
+        'test/base/scoped_command_line_override.h',
         'test/base/test_browser_window.cc',
         'test/base/test_browser_window.h',
         'test/base/test_html_dialog_observer.cc',
         'test/base/test_html_dialog_observer.h',
         'test/base/test_launcher_utils.cc',
         'test/base/test_launcher_utils.h',
         'test/base/test_location_bar.cc',
         'test/base/test_location_bar.h',
         'test/base/test_switches.cc',
         'test/base/test_switches.h',
@@ skipping 4007 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'
 }