Adding partially circular memory buffer wrapper.

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',
     '../components/tracing.gyp:tracing',
     '../media/media.gyp:media',
@@ skipping 304 matching lines @@
     'common/npobject_base.h',
     'common/npobject_proxy.cc',
     'common/npobject_proxy.h',
     'common/npobject_stub.cc',
     'common/npobject_stub.h',
     'common/npobject_util.cc',
     'common/npobject_util.h',
     'common/p2p_messages.h',
     'common/p2p_sockets.h',
     'common/page_zoom.cc',
+    'common/partial_circular_buffer.cc',
+    'common/partial_circular_buffer.h',
     'common/pepper_messages.h',
     'common/pepper_plugin_registry.cc',
     'common/pepper_plugin_registry.h',
     'common/pepper_renderer_instance_data.cc',
     'common/pepper_renderer_instance_data.h',
     'common/plugin_carbon_interpose_constants_mac.cc',
     'common/plugin_carbon_interpose_constants_mac.h',
     'common/plugin_messages.h',
     'common/process_type.cc',
     'common/quota_messages.h',
@@ skipping 250 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }