Expose vector::swap on ScopedPtrVector.

R=piman
BUG=123444

Review URL: https://codereview.chromium.org/11469034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171848 0039d316-1c4b-4281-b951-d872f2087c98

cc/scoped_ptr_vector.h

@@ -84,6 +84,10 @@ class ScopedPtrVector {
     data_.insert(data_.begin() + index, item.release());
   }
 
+  void swap(ScopedPtrVector<T>& other) {
+    data_.swap(other.data_);
+  }
+
   iterator begin() { return data_.begin(); }
   const_iterator begin() const { return data_.begin(); }
   iterator end() { return data_.end(); }