content: Cleanup GpuMemoryBuffer allocation.

content/common/gpu/client/gpu_memory_buffer_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
 
-GpuMemoryBufferImpl::GpuMemoryBufferImpl(gfx::Size size,
+GpuMemoryBufferImpl::GpuMemoryBufferImpl(const gfx::Size& size,
                                          unsigned internalformat)
     : size_(size), internalformat_(internalformat), mapped_(false) {
   DCHECK(IsFormatValid(internalformat));
 }
 
 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {}
 
 // static
 bool GpuMemoryBufferImpl::IsFormatValid(unsigned internalformat) {
   switch (internalformat) {
@@ skipping 17 matching lines @@
   }
 }
 
 bool GpuMemoryBufferImpl::IsMapped() const { return mapped_; }
 
 uint32 GpuMemoryBufferImpl::GetStride() const {
   return size_.width() * BytesPerPixel(internalformat_);
 }
 
 }  // namespace content