Create a new RenderFrameHost per child frame when --site-per-process is enabled.

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',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 357 matching lines @@
         'browser/loader/resource_scheduler_unittest.cc',
         'browser/loader/upload_data_stream_builder_unittest.cc',
         'browser/mach_broker_mac_unittest.cc',
         'browser/media/media_internals_unittest.cc',
         'browser/media/webrtc_identity_store_unittest.cc',
         'browser/net/sqlite_persistent_cookie_store_unittest.cc',
         'browser/notification_service_impl_unittest.cc',
         'browser/plugin_loader_posix_unittest.cc',
         'browser/power_monitor_message_broadcaster_unittest.cc',
         'browser/renderer_host/compositing_iosurface_transformer_mac_unittest.cc',
+        'browser/renderer_host/frame_tree_unittest.cc',
         'browser/renderer_host/gtk_key_bindings_handler_unittest.cc',
         'browser/renderer_host/input/buffered_input_router_unittest.cc',
         'browser/renderer_host/input/immediate_input_router_unittest.cc',
         'browser/renderer_host/input/input_router_unittest.h',
         'browser/renderer_host/input/input_router_unittest.cc',
         'browser/renderer_host/input/input_queue_unittest.cc',
         'browser/renderer_host/input/mock_input_ack_handler.cc',
         'browser/renderer_host/input/mock_input_ack_handler.h',
         'browser/renderer_host/input/mock_input_router_client.cc',
         'browser/renderer_host/input/mock_input_router_client.h',
@@ skipping 1110 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }