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

content/content_common.gypi

Index: content/content_common.gypi
diff --git a/content/content_common.gypi b/content/content_common.gypi
index a021c9418141ec96eaafc707623df4cd1a824ff8..473873829d28cbc028c6db73f3db63c01c2e4e37 100644
--- a/content/content_common.gypi
+++ b/content/content_common.gypi
@@ -517,6 +517,13 @@
       },
     }],
     ['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',
@@ -531,6 +538,22 @@
       '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': [