Rename GrGLBinding->GrGLStandard, no longer a bitfield

include/gpu/gl/GrGLExtensions.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLExtensions_DEFINED
 #define GrGLExtensions_DEFINED
 
 #include "GrGLInterface.h"
 #include "SkString.h"
 #include "SkTArray.h"
 
 /**
  * This helper queries the current GL context for its extensions, remembers them, and can be
  * queried. It supports both glGetString- and glGetStringi-style extension string APIs and will
  * use the latter if it is available.
  */
 class GrGLExtensions {
 public:
-    bool init(GrGLBinding binding, const GrGLInterface* iface) {
-        SkASSERT(binding & iface->fBindingsExported);
-        return this->init(binding, iface->fGetString, iface->fGetStringi, iface->fGetIntegerv);
+    bool init(const GrGLInterface* iface) {
+        return this->init(iface->fStandard,
+                          iface->fGetString,
+                          iface->fGetStringi,
+                          iface->fGetIntegerv);
     }
     /**
      * We sometimes need to use this class without having yet created a GrGLInterface. This version
      * of init expects that getString is always non-NULL while getIntegerv and getStringi are non-
      * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail.
      */
-    bool init(GrGLBinding binding,
+    bool init(GrGLStandard standard,
               GrGLGetStringProc getString,
               GrGLGetStringiProc getStringi,
               GrGLGetIntegervProc getIntegerv);
 
     /**
      * Queries whether an extension is present. This will fail if init() has not been called.
      */
     bool has(const char*) const;
 
     void reset() { fStrings.reset(); }
 
     void print(const char* sep = "\n") const;
 
 private:
     SkTArray<SkString> fStrings;
 };
 
 #endif