Remove parts of //cc we aren't using

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 "base/basictypes.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();
-
-  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;
-    size_t total_bytes_used;
-    bool had_enough_memory;
-  };
-
-  void SaveEntry(const Entry& entry);
-  void GetMinAndMax(size_t* min, size_t* max) const;
-
-  typedef RingBuffer<Entry, 80> RingBufferType;
-  RingBufferType::Iterator Begin() const { return ring_buffer_.Begin(); }
-  RingBufferType::Iterator End() const { return ring_buffer_.End(); }
-
- private:
-  MemoryHistory();
-
-  RingBufferType ring_buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(MemoryHistory);
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_MEMORY_HISTORY_H_