cc: Delete the element being popped in ScopedPtrVector::pop_back()

cc/scoped_ptr_vector.h

 // Copyright 2012 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_SCOPED_PTR_VECTOR_H_
 #define CC_SCOPED_PTR_VECTOR_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 99 matching lines @@
 
   void clear() {
     STLDeleteElements(&data_);
   }
 
   void push_back(scoped_ptr<T> item) {
     data_.push_back(item.release());
   }
 
   void pop_back() {
+    delete data_.back();
     data_.pop_back();
   }
 
   void insert(iterator position, scoped_ptr<T> item) {
     DCHECK(position <= end());
     data_.insert(position, item.release());
   }
 
   void swap(ScopedPtrVector<T>& other) {
     data_.swap(other.data_);
@@ skipping 21 matching lines @@
 
  private:
   std::vector<T*> data_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedPtrVector);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCOPED_PTR_VECTOR_H_