Recycle small uniform buffers.

src/gpu/vk/GrVkBuffer.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 "GrVkBuffer.h"
 #include "GrVkGpu.h"
 #include "GrVkMemory.h"
@@ skipping 90 matching lines @@
 
 void GrVkBuffer::Resource::freeGPUData(const GrVkGpu* gpu) const {
     SkASSERT(fBuffer);
     SkASSERT(fAlloc.fMemory);
     VK_CALL(gpu, DestroyBuffer(gpu->device(), fBuffer, nullptr));
     GrVkMemory::FreeBufferMemory(gpu, fType, fAlloc);
 }
 
 void GrVkBuffer::vkRelease(const GrVkGpu* gpu) {
     VALIDATE();
-    fResource->unref(gpu);
+    fResource->recycle(const_cast<GrVkGpu*>(gpu));
     fResource = nullptr;
     fMapPtr = nullptr;
     VALIDATE();
 }
 
 void GrVkBuffer::vkAbandon() {
     fResource->unrefAndAbandon();
     fResource = nullptr;
     fMapPtr = nullptr;
     VALIDATE();
@@ skipping 80 matching lines @@
     VK_CALL(gpu, UnmapMemory(gpu->device(), alloc.fMemory));
 
     return true;
 }
 
 void GrVkBuffer::validate() const {
     SkASSERT(!fResource || kVertex_Type == fDesc.fType || kIndex_Type == fDesc.fType
              || kCopyRead_Type == fDesc.fType || kCopyWrite_Type == fDesc.fType
              || kUniform_Type == fDesc.fType);
 }