Consolidate GPU buffer implementations

src/gpu/vk/GrVkTransferBuffer.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 "GrVkTransferBuffer.h"
 #include "GrVkGpu.h"
 #include "SkTraceMemoryDump.h"
 
 
-GrVkTransferBuffer* GrVkTransferBuffer::Create(GrVkGpu* gpu, size_t size, GrVkBuffer::Type type) {
+GrVkTransferBuffer* GrVkTransferBuffer::Create(GrVkGpu* gpu, size_t size, GrBufferType type) {
     GrVkBuffer::Desc desc;
-    desc.fDynamic = false;
-    SkASSERT(GrVkBuffer::kCopyRead_Type == type || GrVkBuffer::kCopyWrite_Type == type);
+    desc.fAccessPattern = kStream_GrAccessPattern;
+    SkASSERT(kXferCpuToGpu_GrBufferType == type || kXferGpuToCpu_GrBufferType == type);
     desc.fType = type;
     desc.fSizeInBytes = size;
 
     const GrVkBuffer::Resource* bufferResource = GrVkBuffer::Create(gpu, desc);
     if (!bufferResource) {
         return nullptr;
     }
 
     GrVkTransferBuffer* buffer = new GrVkTransferBuffer(gpu, desc, bufferResource);
     if (!buffer) {
         bufferResource->unref(gpu);
     }
     return buffer;
 }
 
 GrVkTransferBuffer::GrVkTransferBuffer(GrVkGpu* gpu, const GrVkBuffer::Desc& desc,
                                        const GrVkBuffer::Resource* bufferResource)
-    : INHERITED(gpu, desc.fSizeInBytes)
-    , GrVkBuffer(desc, bufferResource) {
+    : INHERITED(gpu, desc, bufferResource) {
     this->registerWithCache();
 }
 
-void GrVkTransferBuffer::onRelease() {
-    if (!this->wasDestroyed()) {
-        this->vkRelease(this->getVkGpu());
-    }
-
-    INHERITED::onRelease();
-}
-
-void GrVkTransferBuffer::onAbandon() {
-    this->vkAbandon();
-    INHERITED::onAbandon();
-}
-
 void GrVkTransferBuffer::setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
                                           const SkString& dumpName) const {
     SkString buffer_id;
     buffer_id.appendU64((uint64_t)this->buffer());
     traceMemoryDump->setMemoryBacking(dumpName.c_str(), "vk_buffer",
                                       buffer_id.c_str());
 }