Move GrGLBufferImpl's GL calls to behind GrGLGpu

src/gpu/gl/GrGLGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGpu_DEFINED
 #define GrGLGpu_DEFINED
 
@@ skipping 77 matching lines @@
         fHWGeometryState.notifyVertexBufferDelete(id);
     }
     void notifyIndexBufferDelete(GrGLuint id) {
         fHWGeometryState.notifyIndexBufferDelete(id);
     }
 
     void buildProgramDesc(GrProgramDesc*,
                           const GrPrimitiveProcessor&,
                           const GrPipeline&) const override;
 
+    // id and type (GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER) of buffer to bind
+    void bindBuffer(GrGLuint id, GrGLenum type);
+
+    void releaseBuffer(GrGLuint id, GrGLenum type);
+
+    // sizes are in bytes
+    void* mapBuffer(GrGLuint id, GrGLenum type, bool dynamic, size_t currentSize,
+                    size_t requestedSize);
+
+    void unmapBuffer(GrGLuint id, GrGLenum type, void* mapPtr);
+
+    void bufferData(GrGLuint id, GrGLenum type, bool dynamic, size_t currentSize,
+                    const void* src, size_t srcSizeInBytes);
+
     const GrGLContext* glContextForTesting() const override {
         return &this->glContext();
     }
 
     void clearStencil(GrRenderTarget*) override;
 
     void invalidateBoundRenderTarget() {
         fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
     }
 
@@ skipping 399 matching lines @@
 
     // Mapping of pixel configs to known supported stencil formats to be used
     // when adding a stencil buffer to a framebuffer.
     int fPixelConfigToStencilIndex[kGrPixelConfigCnt];
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };
 
 #endif