Cleaning up compositing field trial code and enable FCM in beta/stable

content/content_common.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': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../gpu/gpu.gyp:gles2_implementation',
     '../gpu/gpu.gyp:gpu_ipc',
@@ skipping 17 matching lines @@
   ],
   'export_dependent_settings': [
     '../base/base.gyp:base',
   ],
   'sources': [
     'public/common/bindings_policy.h',
     'public/common/child_process_host.h',
     'public/common/child_process_host_delegate.cc',
     'public/common/child_process_host_delegate.h',
     'public/common/child_process_sandbox_support_linux.h',
+    'public/common/compositor_util.cc',
+    'public/common/compositor_util.h',
     'public/common/content_constants.cc',
     'public/common/content_constants.h',
     'public/common/content_descriptors.h',
     'public/common/content_paths.h',
     'public/common/content_restriction.h',
     'public/common/content_switches.cc',
     'public/common/content_switches.h',
     'public/common/context_menu_params.cc',
     'public/common/context_menu_params.h',
     'public/common/console_message_level.h',
@@ skipping 451 matching lines @@
         '../build/extract_from_cab.py',
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
       },
      ]
     }]
   ],
 }