Add Pepper support for several GL extensions

ppapi/thunk/ppb_graphics_3d_api.h

Index: ppapi/thunk/ppb_graphics_3d_api.h
diff --git a/ppapi/thunk/ppb_graphics_3d_api.h b/ppapi/thunk/ppb_graphics_3d_api.h
index 84dc829acdf9b4382e77a389949df460d1957c79..ea865e23c98b31b995879ca3f9c570f592ddba2a 100644
--- a/ppapi/thunk/ppb_graphics_3d_api.h
+++ b/ppapi/thunk/ppb_graphics_3d_api.h
@@ -7,7 +7,6 @@
 
 #include "ppapi/c/ppb_graphics_3d.h"
 #include "ppapi/c/trusted/ppb_graphics_3d_trusted.h"
-#include "ppapi/c/dev/ppb_gles_chromium_texture_mapping_dev.h"
 #include "ppapi/thunk/ppapi_thunk_export.h"
 
 namespace ppapi {
@@ -37,18 +36,6 @@ class PPAPI_THUNK_EXPORT PPB_Graphics3D_API {
   virtual PP_Graphics3DTrustedState FlushSync(int32_t put_offset) = 0;
   virtual PP_Graphics3DTrustedState FlushSyncFast(int32_t put_offset,
                                                   int32_t last_known_get) = 0;
-
-  // GLESChromiumTextureMapping.
-  virtual void* MapTexSubImage2DCHROMIUM(GLenum target,
-                                         GLint level,
-                                         GLint xoffset,
-                                         GLint yoffset,
-                                         GLsizei width,
-                                         GLsizei height,
-                                         GLenum format,
-                                         GLenum type,
-                                         GLenum access) = 0;
-  virtual void UnmapTexSubImage2DCHROMIUM(const void* mem) = 0;
 };
 
 }  // namespace thunk