Move GrGLBufferImpl's GL calls to behind GrGLGpu

src/gpu/gl/GrGLBufferImpl.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 GrGLBufferImpl_DEFINED
 #define GrGLBufferImpl_DEFINED
 
@@ skipping 19 matching lines @@
         // either release or abandon should have been called by the owner of this object.
         SkASSERT(0 == fDesc.fID);
     }
 
     void abandon();
     void release(GrGLGpu* gpu);
 
     GrGLuint bufferID() const { return fDesc.fID; }
     size_t baseOffset() const { return reinterpret_cast<size_t>(fCPUData); }
 
-    void bind(GrGLGpu* gpu) const;
-
     void* map(GrGLGpu* gpu);
     void unmap(GrGLGpu* gpu);
     bool isMapped() const;
     bool updateData(GrGLGpu* gpu, const void* src, size_t srcSizeInBytes);
 
 private:
     void validate() const;
 
     Desc         fDesc;
     GrGLenum     fBufferType; // GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER
     void*        fCPUData;
     void*        fMapPtr;
     size_t       fGLSizeInBytes;     // In certain cases we make the size of the GL buffer object
                                      // smaller or larger than the size in fDesc.
 
     typedef SkNoncopyable INHERITED;
 };
 
 #endif