Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/gl/debug/GrBufferObj.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 "GrBufferObj.h"
-
-void GrBufferObj::allocate(GrGLsizeiptr size, const GrGLchar *dataPtr) {
-    GrAlwaysAssert(size >= 0);
-
-    // delete pre-existing data
-    delete[] fDataPtr;
-
-    fSize = size;
-    fDataPtr = new GrGLchar[size];
-    if (dataPtr) {
-        memcpy(fDataPtr, dataPtr, fSize);
-    }
-    // TODO: w/ no dataPtr the data is unitialized - this could be tracked
-}
-
-void GrBufferObj::deleteAction() {
-
-    // buffers are automatically unmapped when deleted
-    this->resetMapped();
-
-    this->INHERITED::deleteAction();
-}