Revert of Allow creating GLImage-backed textures with glTexStorage2D.

gpu/GLES2/gl2extchromium.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.
 
 // This file contains Chromium-specific GLES2 extensions declarations.
 
 #ifndef GPU_GLES2_GL2EXTCHROMIUM_H_
 #define GPU_GLES2_GL2EXTCHROMIUM_H_
 
 #include <GLES2/gl2.h>
@@ skipping 104 matching lines @@
 #endif
 
 #ifndef GL_RGB_YCBCR_422_CHROMIUM
 #define GL_RGB_YCBCR_422_CHROMIUM 0x78FB
 #endif
 
 #ifndef GL_RGB_YCBCR_420V_CHROMIUM
 #define GL_RGB_YCBCR_420V_CHROMIUM 0x78FC
 #endif
 
-#ifndef GL_TEXTURE_BUFFER_USAGE_CHROMIUM
-#define GL_TEXTURE_BUFFER_USAGE_CHROMIUM 0x78FD
-#endif
-
-#ifndef GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM
-#define GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM 0x78FE
-#endif
-
 /* GL_CHROMIUM_deschedule */
 #ifndef GL_CHROMIUM_deschedule
 #define GL_CHROMIUM_deschedule 1
 #ifdef GL_GLEXT_PROTOTYPES
 GL_APICALL void GL_APIENTRY glDescheduleUntilFinishedCHROMIUM();
 #endif
 typedef void(GL_APIENTRYP PFNGLDESCHEDULEUNTILFINISHEDCHROMIUM)();
 #endif  /* GL_CHROMIUM_deschedule */
 
 /* GL_CHROMIUM_map_sub */
@@ skipping 1089 matching lines @@
 #ifndef GL_CHROMIUM_texture_filtering_hint
 #define GL_CHROMIUM_texture_filtering_hint 1
 #define GL_TEXTURE_FILTERING_HINT_CHROMIUM 0x8AF0
 #endif /* GL_CHROMIUM_texture_filtering_hint */
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // GPU_GLES2_GL2EXTCHROMIUM_H_