Add hooks for GL_EXT_debug_marker in gpu

src/gpu/gl/mesa/GrGLCreateMesaInterface.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/GrGLExtensions.h"
 #include "gl/GrGLInterface.h"
@@ skipping 203 matching lines @@
             if (extensions.has("GL_EXT_framebuffer_blit")) {
                 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT);
             }
         } else {
             // we must have FBOs
             delete interface;
             return NULL;
         }
         GR_GL_GET_PROC(BindFragDataLocationIndexed);
 
+        if (extensions.has("GL_EXT_debug_marker")) {
+            GR_GL_GET_PROC_SUFFIX(InsertEventMarker, EXT);
+            GR_GL_GET_PROC_SUFFIX(PopGroupMarker, EXT);
+            GR_GL_GET_PROC_SUFFIX(PushGroupMarker, EXT);
+        }
+
         interface->fStandard = kGL_GrGLStandard;
         interface->fExtensions.swap(&extensions);
 
         return interface;
     } else {
         return NULL;
     }
 }