Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

content/content_tests.gypi

 # Copyright (c) 2013 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.
 
 {
   'targets': [
     {
       'target_name': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
       'dependencies': [
         '../media/media.gyp:media',
         '../net/net.gyp:net_test_support',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../ui/ui.gyp:ui_test_support',
         '../url/url.gyp:url_lib',
         'content_app',
         'content_browser',
         'content_common',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
-        'public/test/browser_test.h',
         'public/test/browser_test_base.cc',
         'public/test/browser_test_base.h',
+        'public/test/browser_test.h',
         'public/test/browser_test_utils.cc',
         'public/test/browser_test_utils.h',
         'public/test/content_test_suite_base.cc',
         'public/test/content_test_suite_base.h',
         'public/test/download_test_observer.cc',
         'public/test/download_test_observer.h',
         'public/test/fake_speech_recognition_manager.cc',
         'public/test/fake_speech_recognition_manager.h',
         'public/test/js_injection_ready_observer.h',
         'public/test/layouttest_support.h',
@@ skipping 10 matching lines @@
         'public/test/mock_resource_context.cc',
         'public/test/mock_resource_context.h',
         'public/test/render_view_fake_resources_test.cc',
         'public/test/render_view_fake_resources_test.h',
         'public/test/render_view_test.cc',
         'public/test/render_view_test.h',
         'public/test/render_widget_test.cc',
         'public/test/render_widget_test.h',
         'public/test/test_browser_context.cc',
         'public/test/test_browser_context.h',
+        'public/test/test_browser_thread_bundle.cc',
+        'public/test/test_browser_thread_bundle.h',
         'public/test/test_browser_thread.cc',
         'public/test/test_browser_thread.h',
         'public/test/test_content_client_initializer.cc',
         'public/test/test_content_client_initializer.h',
         'public/test/test_file_error_injector.cc',
         'public/test/test_file_error_injector.h',
         'public/test/test_launcher.cc',
         'public/test/test_launcher.h',
         'public/test/test_navigation_observer.cc',
         'public/test/test_navigation_observer.h',
@@ skipping 1109 matching lines @@
             'resource_dir': 'shell/android/shell_apk/res',
             'additional_src_dirs': ['public/android/javatests/',],
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],
     }],
   ],
 }