Add a test for mime handler view iframes and make them work on Windows.

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': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 24 matching lines @@
       '../extensions/browser/api/bluetooth_low_energy/bluetooth_low_energy_apitest.cc',
       '../extensions/browser/api/bluetooth_socket/bluetooth_socket_apitest.cc',
       '../extensions/browser/api/cast_channel/cast_channel_apitest.cc',
       '../extensions/browser/api/cast_channel/test_util.cc',
       '../extensions/browser/api/cast_channel/test_util.h',
       '../extensions/browser/api/runtime/runtime_apitest.cc',
       '../extensions/browser/api/serial/serial_apitest.cc',
       '../extensions/browser/api/usb/usb_manual_apitest.cc',
       '../extensions/browser/app_window/app_window_browsertest.cc',
       '../extensions/browser/guest_view/extension_options/extension_options_apitest.cc',
+      '../extensions/browser/guest_view/mime_handler_view/mime_handler_view_browsertest.cc',
       '../extensions/renderer/console_apitest.cc',
-      '../extensions/renderer/guest_view/mime_handler_view/mime_handler_view_browsertest.cc',
       '../extensions/renderer/script_context_browsertest.cc',
       'app/chrome_command_ids.h',
       'app/chrome_dll.rc',
       'app/chrome_dll_resource.h',
       'app/chrome_version.rc.version',
       'browser/accessibility/browser_accessibility_state_browsertest.cc',
       'browser/app_controller_mac_browsertest.mm',
       'browser/apps/app_browsertest.cc',
       'browser/apps/app_crash_browsertest.cc',
       'browser/apps/app_shim/app_shim_host_manager_browsertest_mac.mm',
@@ skipping 3171 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }