Add hooks for GL_EXT_debug_marker in gpu

src/gpu/gl/angle/GrGLCreateANGLEInterface.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
@@ skipping 135 matching lines @@
     GET_PROC(FramebufferTexture2D);
     GET_PROC(GenFramebuffers);
     GET_PROC(GenRenderbuffers);
     GET_PROC(GetFramebufferAttachmentParameteriv);
     GET_PROC(GetRenderbufferParameteriv);
     GET_PROC(RenderbufferStorage);
 
     functions->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBufferOES");
     functions->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBufferOES");
 
+    if (extensions.has("GL_EXT_debug_marker")) {
+        functions->fInsertEventMarker = (GrGLInsertEventMarkerProc) eglGetProcAddress("glInsertEventMarkerEXT");
+        functions->fPushGroupMarker = (GrGLInsertEventMarkerProc) eglGetProcAddress("glPushGroupMarkerEXT");
+        functions->fPopGroupMarker = (GrGLPopGroupMarkerProc) eglGetProcAddress("glPopGropuMarkerEXT");
+    }
+
     interface->fExtensions.init(kGLES_GrGLStandard,
                                 interface->fFunctions.fGetString,
                                 interface->fFunctions.fGetStringi,
                                 interface->fFunctions.fGetIntegerv);
     return interface;
 }