Delete dead code: OmxVideoDecodeAccelerator is unused.

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',
     '../components/tracing.gyp:tracing',
     '../media/media.gyp:media',
     '../net/net.gyp:net',
@@ skipping 462 matching lines @@
         'common/gpu/media/android_video_decode_accelerator.h',
       ],
     }],
     ['target_arch=="arm" and chromeos == 1 and use_x11 == 1', {
       'dependencies': [
         '../media/media.gyp:media',
       ],
       'sources': [
         'common/gpu/media/exynos_video_decode_accelerator.cc',
         'common/gpu/media/exynos_video_decode_accelerator.h',
-        'common/gpu/media/gles2_texture_to_egl_image_translator.cc',
-        'common/gpu/media/gles2_texture_to_egl_image_translator.h',
-        'common/gpu/media/omx_video_decode_accelerator.cc',
-        'common/gpu/media/omx_video_decode_accelerator.h',
       ],
       'include_dirs': [
         '<(DEPTH)/third_party/khronos',
-        '<(DEPTH)/third_party/openmax/il',
       ],
       'link_settings': {
         'libraries': [
           '-lEGL',
           '-lGLESv2',
         ],
       },
     }],
     ['target_arch != "arm" and chromeos == 1 and use_x11 == 1', {
       'sources': [
@@ skipping 64 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }