Add a histogram for renderer memory usage.

webkit/glue/webkit_glue.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.
 
 {
   'variables': {
     'conditions': [
       ['inside_chromium_build==0', {
         'webkit_src_dir': '../../../../..',
       },{
@@ skipping 279 matching lines @@
         'fling_animator_impl_android.cc',
         'fling_animator_impl_android.h',
         'ftp_directory_listing_response_delegate.cc',
         'ftp_directory_listing_response_delegate.h',
         'glue_serialize.cc',
         'glue_serialize.h',
         'image_decoder.cc',
         'image_decoder.h',
         'image_resource_fetcher.cc',
         'image_resource_fetcher.h',
+        'memory_usage.cc',
+        'memory_usage.h',
         'multi_resolution_image_resource_fetcher.cc',
         'multi_resolution_image_resource_fetcher.h',
         'multipart_response_delegate.cc',
         'multipart_response_delegate.h',
         'network_list_observer.h',
         'npruntime_util.cc',
         'npruntime_util.h',
         'resource_fetcher.cc',
         'resource_fetcher.h',
         'resource_loader_bridge.cc',
@@ skipping 194 matching lines @@
               },
               'includes': [ '../../build/grit_action.gypi' ],
             },
           ],
           'includes': [ '../../build/grit_target.gypi' ],
         },
       ],
     }],
   ],
 }