Extract Chromium-specific parts out of third_party/khronos/GLES2 .

gpu/GLES2/gl2chromium.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 is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // DO NOT EDIT!
 
-// Because we are using both the real system GL and our own.
-// emulated GL we need to use different names to avoid conflicts.
+// This file contains Chromium-specific GLES2 declarations.
 
 #ifndef GPU_GLES2_GL2CHROMIUM_H_
 #define GPU_GLES2_GL2CHROMIUM_H_
 
+#include <GLES2/gl2platform.h>
+#define GL_CONTEXT_LOST 0x300E
+
+// Because we are using both the real system GL and our own
+// emulated GL we need to use different names to avoid conflicts.
 #if defined(GLES2_USE_CPP_BINDINGS)
 #define GLES2_GET_FUN(name) gles2::GetGLContext()->name
 #else
 #define GLES2_GET_FUN(name) GLES2 ## name
 #endif
 
 #define glActiveTexture GLES2_GET_FUN(ActiveTexture)
 #define glAttachShader GLES2_GET_FUN(AttachShader)
 #define glBindAttribLocation GLES2_GET_FUN(BindAttribLocation)
 #define glBindBuffer GLES2_GET_FUN(BindBuffer)
@@ skipping 199 matching lines @@
 #define glReleaseTexImage2DCHROMIUM GLES2_GET_FUN(ReleaseTexImage2DCHROMIUM)
 #define glTraceBeginCHROMIUM GLES2_GET_FUN(TraceBeginCHROMIUM)
 #define glTraceEndCHROMIUM GLES2_GET_FUN(TraceEndCHROMIUM)
 #define glAsyncTexSubImage2DCHROMIUM GLES2_GET_FUN(AsyncTexSubImage2DCHROMIUM)
 #define glAsyncTexImage2DCHROMIUM GLES2_GET_FUN(AsyncTexImage2DCHROMIUM)
 #define glDiscardFramebufferEXT GLES2_GET_FUN(DiscardFramebufferEXT)
 #define glLoseContextCHROMIUM GLES2_GET_FUN(LoseContextCHROMIUM)
 
 #endif  // GPU_GLES2_GL2CHROMIUM_H_