really really fix iOS build.

src/gpu/gl/iOS/GrGLCreateNativeInterface_iOS.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/GrGLInterface.h"
 
 #import <OpenGLES/ES2/gl.h>
 #import <OpenGLES/ES2/glext.h>
 
 const GrGLInterface* GrGLCreateNativeInterface() {
     GrGLInterface* interface = SkNEW(GrGLInterface);
 
-    GrGLInterface::Functions* functions = &interface->functions;
+    GrGLInterface::Functions* functions = &interface->fFunctions;
 
     functions->fActiveTexture = glActiveTexture;
     functions->fAttachShader = glAttachShader;
     functions->fBindAttribLocation = glBindAttribLocation;
     functions->fBindBuffer = glBindBuffer;
     functions->fBindTexture = glBindTexture;
     functions->fBlendColor = glBlendColor;
     functions->fBlendFunc = glBlendFunc;
     functions->fBufferData = (GrGLBufferDataProc)glBufferData;
     functions->fBufferSubData = (GrGLBufferSubDataProc)glBufferSubData;
@@ skipping 113 matching lines @@
     functions->fBindVertexArray = glBindVertexArrayOES;
     functions->fDeleteVertexArrays = glDeleteVertexArraysOES;
     functions->fGenVertexArrays = glGenVertexArraysOES;
 #endif
 
     interface->fStandard = kGLES_GrGLStandard;
     interface->fExtensions.init(kGLES_GrGLStandard, glGetString, NULL, glGetIntegerv);
 
     return interface;
 }