Always create FrameTreeNodes and RenderFrameHosts for every frame.

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',
       'dependencies': [
@@ skipping 922 matching lines @@
             'browser/child_process_security_policy_browsertest.cc',
             'browser/database_browsertest.cc',
             'browser/device_orientation/device_inertial_sensor_browsertest.cc',
             'browser/devtools/renderer_overrides_handler_browsertest.cc',
             'browser/dom_storage/dom_storage_browsertest.cc',
             'browser/download/download_browsertest.cc',
             'browser/download/drag_download_file_browsertest.cc',
             'browser/download/mhtml_generation_browsertest.cc',
             'browser/download/save_package_browsertest.cc',
             'browser/fileapi/file_system_browsertest.cc',
+            'browser/frame_host/frame_tree_browsertest.cc',
             'browser/gpu/compositor_util_browsertest.cc',
             'browser/gpu/gpu_ipc_browsertests.cc',
             'browser/indexed_db/indexed_db_browsertest.cc',
             'browser/loader/resource_dispatcher_host_browsertest.cc',
             'browser/media/encrypted_media_browsertest.cc',
             'browser/media/media_browsertest.cc',
             'browser/media/media_browsertest.h',
             'browser/media/media_source_browsertest.cc',
             'browser/media/webrtc_internals_browsertest.cc',
             'browser/plugin_data_remover_impl_browsertest.cc',
@@ skipping 666 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }