Removing GL context rate limiting feature and related wrappers

ppapi/lib/gl/include/GLES2/gl2ext.h

 #ifndef __gl2ext_h_
 #define __gl2ext_h_
 
 /* $Revision: 16619 $ on $Date:: 2012-01-18 10:00:14 -0800 #$ */
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*
@@ skipping 1766 matching lines @@
 #if !defined(GLES2_USE_CPP_BINDINGS)
 GL_APICALL const GLchar* GL_APIENTRY glGetRequestableExtensionsCHROMIUM (void);
 GL_APICALL void GL_APIENTRY glRequestExtensionCHROMIUM (const GLchar *extension);
 #endif
 #else
 typedef const GLchar* (GL_APIENTRYP PFNGLGETREQUESTABLEEXTENSIONSCHROMIUM) (void);
 typedef void (GL_APIENTRYP PFNGLREQUESTEXTENSIONCHROMIUM) (const GLchar *extension);
 #endif
 #endif
 
-/* GL_CHROMIUM_rate_limit_offscreen_context */
-/*
- * This extension will block if the calling context has gotten more than two
- * glRateLimit calls ahead of the GPU process. This keeps the client in sync
- * with the GPU without having to call swapbuffers, which has potentially
- * undesirable side effects.
- */
-#ifndef GL_CHROMIUM_rate_limit_offscreen_context
-#define GL_CHROMIUM_rate_limit_offscreen_context 1
-#ifdef GL_GLEXT_PROTOTYPES
-#define glRateLimitOffscreenContextCHROMIUM  GLES2_GET_FUN(RateLimitOffscreenContextCHROMIUM)
-#if !defined(GLES2_USE_CPP_BINDINGS)
-GL_APICALL void GL_APIENTRY glRateLimitOffscreenContextCHROMIUM (void);
-#endif
-#else
-typedef void (GL_APIENTRYP PFNGLRATELIMITOFFSCREENCONTEXTCHROMIUM) ();
-#endif
-#endif
-
 /* GL_CHROMIUM_get_multiple */
 /*
  * This extension provides functions for quering multiple GL state with a single
  * call.
  */
 #ifndef GL_CHROMIUM_get_multiple
 #define GL_CHROMIUM_get_multiple 1
 #ifdef GL_GLEXT_PROTOTYPES
 #define glGetProgramInfoCHROMIUM  GLES2_GET_FUN(GetProgramInfovCHROMIUM)
 #if !defined(GLES2_USE_CPP_BINDINGS)
@@ skipping 184 matching lines @@
 #define GL_CHROMIUM_command_buffer_query 1
 // TODO(gman): Get official numbers for these constants.
 #define GL_COMMANDS_ISSUED_CHROMIUM 0x84F2
 #endif
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* __gl2ext_h_ */