Add a dependency from Gin to base

gin/per_context_data.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 GIN_PER_CONTEXT_DATA_H_
 #define GIN_PER_CONTEXT_DATA_H_
 
-#include <vector>
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "v8/include/v8.h"
 
 namespace gin {
 
 class ContextSupplement {
  public:
   ContextSupplement();
   virtual ~ContextSupplement();
 
   virtual void Detach(v8::Handle<v8::Context> context) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ContextSupplement);
 };
 
 class PerContextData {
  public:
   explicit PerContextData(v8::Handle<v8::Context> context);
   ~PerContextData();
 
   // Can return NULL after the ContextHolder has detached from context.
   static PerContextData* From(v8::Handle<v8::Context>);
   void Detach(v8::Handle<v8::Context> context);
 
-  // Takes ownership of the supplement.
-  void AddSupplement(ContextSupplement* supplement);
+  void AddSupplement(scoped_ptr<ContextSupplement> supplement);
 
  private:
-  typedef std::vector<ContextSupplement*> SuplementVector;
+  typedef ScopedVector<ContextSupplement> SuplementVector;
 
-  // Owning reference.
   SuplementVector supplements_;
 
   DISALLOW_COPY_AND_ASSIGN(PerContextData);
 };
 
 }  // namespace gin
 
 #endif  // GIN_PER_CONTEXT_DATA_H_