Android: Remove unused ZoomController, which also references extensions.

chrome/chrome_tests_unit.gypi

 # Copyright 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': {
     'chrome_unit_tests_sources': [
       '../apps/saved_files_service_unittest.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
@@ skipping 2574 matching lines @@
             'browser/ui/search/search_tab_helper_unittest.cc',
             'browser/ui/tab_contents/tab_contents_iterator_unittest.cc',
             'browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc',
             'browser/ui/toolbar/toolbar_model_unittest.cc',
             'browser/ui/toolbar/wrench_menu_model_unittest.cc',
             'browser/ui/website_settings/permission_menu_model_unittest.cc',
             'browser/ui/webui/ntp/suggestions_combiner_unittest.cc',
             'browser/ui/webui/web_dialog_web_contents_delegate_unittest.cc',
             'browser/ui/window_sizer/window_sizer_common_unittest.cc',
             'browser/ui/window_sizer/window_sizer_unittest.cc',
+            'browser/ui/zoom/zoom_controller_unittest.cc',
             'browser/upgrade_detector_impl_unittest.cc',
             'common/net/x509_certificate_model_unittest.cc',
             'test/base/browser_with_test_window_test.cc',
             'test/base/browser_with_test_window_test.h',
             'test/base/test_browser_window.h',
 
             'browser/sessions/persistent_tab_restore_service_unittest.cc',
             'browser/sessions/session_backend_unittest.cc',
 
             # Test files cannot be opened on Android.
@@ skipping 271 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }