Convert //cc from scoped_ptr to std::unique_ptr.

cc/resources/memory_history.h

 // 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.
 
 #ifndef CC_RESOURCES_MEMORY_HISTORY_H_
 #define CC_RESOURCES_MEMORY_HISTORY_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "cc/debug/ring_buffer.h"
 
 namespace cc {
 
 // Maintains a history of memory for each frame.
 class MemoryHistory {
  public:
-  static scoped_ptr<MemoryHistory> Create();
+  static std::unique_ptr<MemoryHistory> Create();
 
   size_t HistorySize() const { return ring_buffer_.BufferSize(); }
 
   struct Entry {
     Entry()
         : total_budget_in_bytes(0),
           total_bytes_used(0),
           had_enough_memory(false) {}
 
     size_t total_budget_in_bytes;
@@ skipping 11 matching lines @@
   MemoryHistory();
 
   RingBufferType ring_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryHistory);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_MEMORY_HISTORY_H_