Remove a non-existing file from content_common.gypi

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:gpu_ipc',
     '../ipc/ipc.gyp:ipc',
@@ skipping 136 matching lines @@
     'common/gpu/gpu_channel.cc',
     'common/gpu/gpu_channel.h',
     'common/gpu/gpu_channel_manager.cc',
     'common/gpu/gpu_channel_manager.h',
     'common/gpu/gpu_command_buffer_stub.cc',
     'common/gpu/gpu_command_buffer_stub.h',
     'common/gpu/gpu_config.h',
     'common/gpu/gpu_feature_flags.cc',
     'common/gpu/gpu_feature_flags.h',
     'common/gpu/gpu_memory_allocation.h',
-    'common/gpu/gpu_memory_management.h',
     'common/gpu/gpu_memory_manager.cc',
     'common/gpu/gpu_memory_manager.h',
     'common/gpu/gpu_messages.h',
     'common/gpu/gpu_process_launch_causes.h',
     'common/gpu/gpu_watchdog.h',
     'common/gpu/image_transport_surface.h',
     'common/gpu/image_transport_surface.cc',
     'common/gpu/image_transport_surface_linux.cc',
     'common/gpu/image_transport_surface_mac.cc',
     'common/gpu/image_transport_surface_win.cc',
@@ skipping 216 matching lines @@
         '../build/extract_from_cab.py',
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
       },
      ]
     }]
   ],
 }