convert //gpu to std::unique_ptr

gpu/command_buffer/common/buffer.h

 // Copyright (c) 2014 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.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_BUFFER_H_
 #define GPU_COMMAND_BUFFER_COMMON_BUFFER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/trace_event/memory_allocator_dump.h"
 #include "gpu/gpu_export.h"
 
 namespace base {
   class SharedMemory;
 }
 
 namespace gpu {
 
 class GPU_EXPORT BufferBacking {
  public:
   virtual ~BufferBacking() {}
   virtual void* GetMemory() const = 0;
   virtual size_t GetSize() const = 0;
 };
 
 class GPU_EXPORT SharedMemoryBufferBacking : public BufferBacking {
  public:
-  SharedMemoryBufferBacking(scoped_ptr<base::SharedMemory> shared_memory,
+  SharedMemoryBufferBacking(std::unique_ptr<base::SharedMemory> shared_memory,
                             size_t size);
   ~SharedMemoryBufferBacking() override;
   void* GetMemory() const override;
   size_t GetSize() const override;
   base::SharedMemory* shared_memory() { return shared_memory_.get(); }
 
  private:
-  scoped_ptr<base::SharedMemory> shared_memory_;
+  std::unique_ptr<base::SharedMemory> shared_memory_;
   size_t size_;
   DISALLOW_COPY_AND_ASSIGN(SharedMemoryBufferBacking);
 };
 
 // Buffer owns a piece of shared-memory of a certain size.
 class GPU_EXPORT Buffer : public base::RefCountedThreadSafe<Buffer> {
  public:
-  explicit Buffer(scoped_ptr<BufferBacking> backing);
+  explicit Buffer(std::unique_ptr<BufferBacking> backing);
 
   BufferBacking* backing() const { return backing_.get(); }
   void* memory() const { return memory_; }
   size_t size() const { return size_; }
 
   // Returns NULL if the address overflows the memory.
   void* GetDataAddress(uint32_t data_offset, uint32_t data_size) const;
 
  private:
   friend class base::RefCountedThreadSafe<Buffer>;
   ~Buffer();
 
-  scoped_ptr<BufferBacking> backing_;
+  std::unique_ptr<BufferBacking> backing_;
   void* memory_;
   size_t size_;
 
   DISALLOW_COPY_AND_ASSIGN(Buffer);
 };
 
-static inline scoped_ptr<BufferBacking> MakeBackingFromSharedMemory(
-    scoped_ptr<base::SharedMemory> shared_memory,
+static inline std::unique_ptr<BufferBacking> MakeBackingFromSharedMemory(
+    std::unique_ptr<base::SharedMemory> shared_memory,
     size_t size) {
-  return scoped_ptr<BufferBacking>(
+  return std::unique_ptr<BufferBacking>(
       new SharedMemoryBufferBacking(std::move(shared_memory), size));
 }
 
 static inline scoped_refptr<Buffer> MakeBufferFromSharedMemory(
-    scoped_ptr<base::SharedMemory> shared_memory,
+    std::unique_ptr<base::SharedMemory> shared_memory,
     size_t size) {
   return new Buffer(
       MakeBackingFromSharedMemory(std::move(shared_memory), size));
 }
 
 // Generates GUID which can be used to trace buffer using an Id.
 GPU_EXPORT base::trace_event::MemoryAllocatorDumpGuid GetBufferGUIDForTracing(
     uint64_t tracing_process_id,
     int32_t buffer_id);
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_BUFFER_H_