Revert of Add transfer buffer support.

src/gpu/gl/GrGLTransferBuffer.cpp

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrGLTransferBuffer.h"
-#include "GrGLGpu.h"
-#include "SkTraceMemoryDump.h"
-
-GrGLTransferBuffer::GrGLTransferBuffer(GrGLGpu* gpu, const Desc& desc, GrGLenum type)
-    : INHERITED(gpu, desc.fSizeInBytes)
-    , fImpl(gpu, desc, type) {
-    this->registerWithCache();
-}
-
-void GrGLTransferBuffer::onRelease() {
-    if (!this->wasDestroyed()) {
-        fImpl.release(this->getGpuGL());
-    }
-
-    INHERITED::onRelease();
-}
-
-void GrGLTransferBuffer::onAbandon() {
-    fImpl.abandon();
-    INHERITED::onAbandon();
-}
-
-void* GrGLTransferBuffer::onMap() {
-    if (!this->wasDestroyed()) {
-        return fImpl.map(this->getGpuGL());
-    } else {
-        return nullptr;
-    }
-}
-
-void GrGLTransferBuffer::onUnmap() {
-    if (!this->wasDestroyed()) {
-        fImpl.unmap(this->getGpuGL());
-    }
-}
-
-void GrGLTransferBuffer::setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
-                                          const SkString& dumpName) const {
-    SkString buffer_id;
-    buffer_id.appendU32(this->bufferID());
-    traceMemoryDump->setMemoryBacking(dumpName.c_str(), "gl_buffer",
-                                      buffer_id.c_str());
-}