Add CHROMIUM_ycbcr_422_image extension.

ui/gl/gl_bindings.h

 // 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.
 
 #ifndef UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 #include <string>
 
 // Includes the platform independent and platform dependent GL headers.
@@ skipping 121 matching lines @@
 // GL_CHROMIUM_sync_query
 #define GL_COMMANDS_COMPLETED_CHROMIUM                   0x84F7
 
 // GL_CHROMIUM_gpu_memory_buffer_image
 #define GL_MAP_CHROMIUM                                  0x78F1
 #define GL_SCANOUT_CHROMIUM                              0x78F2
 
 // GL_CHROMIUM_yuv_420_image
 #define GL_RGB_YUV_420_CHROMIUM                          0x78FA
 
+// GL_CHROMIUM_ycbcr_422_image
+#define GL_RGB_YCRCR_422_CHROMIUM 0x78FB

[reveman, 2015/08/26 18:21:08]

nit: align 0x78FB with 0x78FA 

+
 // GL_CHROMIUM_schedule_overlay_plane
 #define GL_OVERLAY_TRANSFORM_NONE_CHROMIUM               0x9245
 #define GL_OVERLAY_TRANSFORM_FLIP_HORIZONTAL_CHROMIUM    0x9246
 #define GL_OVERLAY_TRANSFORM_FLIP_VERTICAL_CHROMIUM      0x9247
 #define GL_OVERLAY_TRANSFORM_ROTATE_90_CHROMIUM          0x9248
 #define GL_OVERLAY_TRANSFORM_ROTATE_180_CHROMIUM         0x9249
 #define GL_OVERLAY_TRANSFORM_ROTATE_270_CHROMIUM         0x924A
 
 // GL_CHROMIUM_subscribe_uniforms
 #define GL_SUBSCRIBED_VALUES_BUFFER_CHROMIUM             0x924B
@@ skipping 307 matching lines @@
 #elif defined(OS_ANDROID)
 
 GL_EXPORT extern EGLApi* g_current_egl_context;
 GL_EXPORT extern DriverEGL g_driver_egl;
 
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_BINDINGS_H_