Allow creating GLImage-backed textures with glTexStorage2D.

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_
 
 // Includes the platform independent and platform dependent GL headers.
 // Only include this in cc files. It pulls in system headers, including
 // the X11 headers on linux, which define all kinds of macros that are
@@ skipping 130 matching lines @@
 
 // GL_CHROMIUM_sync_query
 #define GL_COMMANDS_COMPLETED_CHROMIUM                   0x84F7
 
 // GL_CHROMIUM_ycrcb_420_image
 #define GL_RGB_YCRCB_420_CHROMIUM                        0x78FA
 
 // GL_CHROMIUM_ycbcr_422_image
 #define GL_RGB_YCBCR_422_CHROMIUM                        0x78FB
 
+// GL_CHROMIUM_texture_buffer
+#define GL_TEXTURE_BUFFER_USAGE_CHROMIUM 0x78FD
+#define GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM 0x78FE
+
 // GL_CHROMIUM_ycbcr_420v_image
 #define GL_RGB_YCBCR_420V_CHROMIUM 0x78FC
 
 // 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
@@ skipping 351 matching lines @@
 #endif
 
 #if defined(USE_GLX)
 GL_EXPORT extern GLXApi* g_current_glx_context;
 GL_EXPORT extern DriverGLX g_driver_glx;
 #endif
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_BINDINGS_H_