Enable GLX/EGL backend switching while run HW video decode with libva.

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',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
@@ skipping 499 matching lines @@
         '<(DEPTH)/third_party/khronos',
       ],
       'link_settings': {
         'libraries': [
           '-lEGL',
           '-lGLESv2',
         ],
       },
     }],
     ['target_arch != "arm" and chromeos == 1 and use_x11 == 1', {
+      'dependencies': [
+        '../media/media.gyp:media',
+      ],
+      'variables': {
+        'vavda_vagl_egl%': 0,
+      },
+      'vavda_vagl_egl%': '<(vavda_vagl_egl)',

[Ami GONE FROM CHROMIUM, 2013/10/30 20:08:05]

Is the indirection really necessary?  (I think it is not).

       'sources': [
         'common/gpu/media/h264_dpb.cc',
         'common/gpu/media/h264_dpb.h',
         'common/gpu/media/va_surface.h',
         'common/gpu/media/vaapi_h264_decoder.cc',
         'common/gpu/media/vaapi_h264_decoder.h',
         'common/gpu/media/vaapi_video_decode_accelerator.cc',
         'common/gpu/media/vaapi_video_decode_accelerator.h',
         'common/gpu/media/vaapi_wrapper.cc',
         'common/gpu/media/vaapi_wrapper.h',
       ],
       'include_dirs': [
         '<(DEPTH)/third_party/libva',
       ],
+      'conditions': [
+        ['vavda_vagl_egl == 1', {
+          'defines': [
+            'VAVDA_VATEXTURE_EGL_BACKEND',
+          ],
+          'include_dirs': [
+            '<(DEPTH)/third_party/khronos',
+          ],
+          'link_settings': {
+            'libraries': [
+              '-lEGL',
+              '-lGLESv2',
+            ],
+          },
+        }],
+      ],
     }],
     ['OS=="win"', {
       'dependencies': [
         '../media/media.gyp:media',
         '../ui/gl/gl.gyp:gl',
       ],
       'link_settings': {
         'libraries': [
            '-ld3d9.lib',
            '-ldxva2.lib',
@@ skipping 41 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }