Convert //extensions/{common,shell} from scoped_ptr to std::unique_ptr

extensions/common/value_counter.h

 // Copyright 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 EXTENSIONS_COMMON_VALUE_COUNTER_H_
 #define EXTENSIONS_COMMON_VALUE_COUNTER_H_
 
+#include <memory>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace base {
 class Value;
 }
 
 namespace extensions {
 
 // Keeps a running count of Values, like map<Value, int>. Adding/removing
 // values increments/decrements the count associated with a given Value.
 //
@@ skipping 13 matching lines @@
   // Removes |value| from the set, and returns true if it removed the last
   // value equal to |value|. If there are more equal values, or if there
   // weren't any in the first place, returns false.
   bool Remove(const base::Value& value);
 
   // Returns true if there are no values of any type being counted.
   bool is_empty() const { return entries_.empty(); }
 
  private:
   struct Entry;
-  std::vector<scoped_ptr<Entry>> entries_;
+  std::vector<std::unique_ptr<Entry>> entries_;
 
   DISALLOW_COPY_AND_ASSIGN(ValueCounter);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_VALUE_COUNTER_H_