Move all the layout tests that ran under browser_tests to run under content_browsertests.

chrome/browser_tests.isolate

 # 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': {
     'isolate_dependency_tracked': [
       '../net/tools/testserver/asn1.py',
       '../net/tools/testserver/echo_message.py',
       '../net/tools/testserver/minica.py',
       '../net/tools/testserver/testserver.py',
@@ skipping 569 matching lines @@
           'test/data/gpu/feature_compositing.html',
           'test/data/gpu/feature_multisampling.html',
           'test/data/gpu/feature_raf_no_damage.html',
           'test/data/gpu/feature_webgl.html',
           'test/data/gpu/webgl_popup.html',
           'test/data/iframe.html',
           'test/data/iframe_in_empty_frame.html',
           'test/data/iframe_in_empty_frame.js',
           'test/data/is_search_provider_installed.html',
           'test/data/is_search_provider_installed_with_exception.html',
-          'test/data/media/bear.ogv',
-          'test/data/media/bear.webm',
-          'test/data/media/bear_pcm.wav',
-          'test/data/media/bear_silent.ogv',
-          'test/data/media/bear_silent.webm',
-          'test/data/media/player.html',
           'test/data/navigate_opener.html',
           'test/data/nosniff-test.html',
           'test/data/nosniff-test.html.mock-http-headers',
           'test/data/notifications/notifications_request_function.html',
           'test/data/notifications/notifications_request_inline.html',
           'test/data/page_cycler/animate2.gif',
           'test/data/page_cycler/basic_css.html',
           'test/data/page_cycler/basic_html.html',
           'test/data/page_cycler/basic_js.html',
           'test/data/popup_blocker/popup-blocked-to-post-blank.html',
@@ skipping 1321 matching lines @@
       },
     }, {
       'variables': {
         'isolate_dependency_tracked': [
           '../third_party/tlslite/tlslite/integration/TLSTwistedProtocolWrapper.py',
         ],
       },
     }],
   ],
 }