Consolidate GPU buffer implementations

src/gpu/vk/GrVkTransferBuffer.cpp

Index: src/gpu/vk/GrVkTransferBuffer.cpp
diff --git a/src/gpu/vk/GrVkTransferBuffer.cpp b/src/gpu/vk/GrVkTransferBuffer.cpp
index 37306277642468905be01953fefa5be45f9d6690..799e319654e908918045d4b1e0307603f87af7d1 100644
--- a/src/gpu/vk/GrVkTransferBuffer.cpp
+++ b/src/gpu/vk/GrVkTransferBuffer.cpp
@@ -10,10 +10,10 @@
 #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;
 
@@ -31,24 +31,10 @@ GrVkTransferBuffer* GrVkTransferBuffer::Create(GrVkGpu* gpu, size_t size, GrVkBu
 
 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;