Unobfuscate RWHVMac accelerated compositing code path by separating it from plugin code

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     'browser/debugger/devtools_resources.gyp:devtools_resources',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:http_server',
@@ skipping 439 matching lines @@
     'browser/renderer_host/backing_store_manager.h',
     'browser/renderer_host/backing_store_skia.cc',
     'browser/renderer_host/backing_store_skia.h',
     'browser/renderer_host/backing_store_win.cc',
     'browser/renderer_host/backing_store_win.h',
     'browser/renderer_host/buffered_resource_handler.cc',
     'browser/renderer_host/buffered_resource_handler.h',
     'browser/renderer_host/clipboard_message_filter.cc',
     'browser/renderer_host/clipboard_message_filter.h',
     'browser/renderer_host/clipboard_message_filter_mac.mm',
+    'browser/renderer_host/compositing_iosurface_mac.h',
+    'browser/renderer_host/compositing_iosurface_mac.mm',
     'browser/renderer_host/cross_site_resource_handler.cc',
     'browser/renderer_host/cross_site_resource_handler.h',
     'browser/renderer_host/database_message_filter.cc',
     'browser/renderer_host/database_message_filter.h',
     'browser/renderer_host/doomed_resource_handler.cc',
     'browser/renderer_host/doomed_resource_handler.h',
     'browser/renderer_host/file_utilities_message_filter.cc',
     'browser/renderer_host/file_utilities_message_filter.h',
     'browser/renderer_host/gamepad_browser_message_filter.cc',
     'browser/renderer_host/gamepad_browser_message_filter.h',
@@ skipping 444 matching lines @@
       ],
     }],
     ['input_speech==0', {
       'sources/': [
         ['exclude', '^browser/speech/'],
       ],
     }],
   ],
 }