Add vulkan files into skia repo.

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
new file mode 100644
index 0000000000000000000000000000000000000000..37306277642468905be01953fefa5be45f9d6690
--- /dev/null
+++ b/src/gpu/vk/GrVkTransferBuffer.cpp
@@ -0,0 +1,58 @@
+/*
+* 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) {
+    GrVkBuffer::Desc desc;
+    desc.fDynamic = false;
+    SkASSERT(GrVkBuffer::kCopyRead_Type == type || GrVkBuffer::kCopyWrite_Type == 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) {
+    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());
+}