Create content::WebContentsDestroyedWatcher, use it in many tests.

chrome/chrome_tests.gypi

 # Copyright 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.
 {
   'variables' : {
     'chromedriver_unittest_sources': [
       'test/chromedriver/capabilities_unittest.cc',
       'test/chromedriver/chrome/chrome_finder_unittest.cc',
       'test/chromedriver/chrome/console_logger_unittest.cc',
       'test/chromedriver/chrome/device_manager_unittest.cc',
@@ skipping 192 matching lines @@
         'browser/extensions/extension_test_message_listener.cc',
         'browser/extensions/extension_test_message_listener.h',
         'browser/extensions/notifications_apitest.cc',
         'browser/extensions/window_open_interactive_apitest.cc',
         'browser/extensions/extension_fullscreen_apitest.cc',
         'browser/extensions/extension_pointer_lock_apitest.cc',
         'browser/mouseleave_browsertest.cc',
         'browser/notifications/desktop_notifications_unittest.cc',
         'browser/notifications/desktop_notifications_unittest.h',
         'browser/notifications/notification_browsertest.cc',
-        'browser/printing/print_dialog_cloud_interative_uitest.cc',
         'browser/task_manager/task_manager_browsertest_util.cc',
         'browser/ui/autofill/autofill_popup_controller_interactive_uitest.cc',
         'browser/ui/browser_focus_uitest.cc',
         'browser/ui/cocoa/panels/panel_cocoa_browsertest.mm',
         'browser/ui/fullscreen/fullscreen_controller_interactive_browsertest.cc',
         'browser/ui/fullscreen/fullscreen_controller_state_interactive_browsertest.cc',
         'browser/ui/gtk/bookmarks/bookmark_bar_gtk_interactive_uitest.cc',
         'browser/ui/gtk/bookmarks/bookmark_bubble_gtk_browsertest.cc',
         'browser/ui/omnibox/omnibox_view_browsertest.cc',
         'browser/ui/panels/base_panel_browser_test.cc',
@@ skipping 1666 matching lines @@
           'dependencies': [
             # Runtime dependencies.
             '../third_party/widevine/cdm/widevine_cdm.gyp:widevinecdmadapter',
             '../media/media.gyp:clearkeycdmadapter',
           ],
         }],
         ['enable_printing!=1', {
           'sources/': [
             ['exclude', '^browser/extensions/api/cloud_print_private/cloud_print_private_apitest.cc'],
             ['exclude', '^browser/printing/cloud_print/test/.*'],
-            ['exclude', '^browser/printing/print_dialog_cloud_interative_uitest.cc'],
             ['exclude', '^browser/printing/printing_layout_browsertest.cc'],
             ['exclude', '^browser/printing/print_preview_dialog_controller_browsertest.cc'],
             ['exclude', '^browser/ui/webui/print_preview/print_preview_ui_browsertest.cc'],
             ['exclude', '^renderer/printing/print_web_view_helper_browsertest.cc'],
             ['exclude', '^test/data/webui/print_preview.cc'],
             ['exclude', '^test/data/webui/print_preview.h'],
             ['exclude', '^test/data/webui/print_preview.js'],
           ],
         }],
         ['enable_mdns==1', {
@@ skipping 1266 matching lines @@
             'utility',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
           ],
         }]
     }],
   ],  # 'conditions'
 }