Update scoped_ptr references to be unique_ptr in src/base comments.

base/memory/scoped_vector_unittest.cc

 // Copyright (c) 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.
 
 #include "base/memory/scoped_vector.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 304 matching lines @@
   }
   for(LifeCycleWatcher* it = watchers; it != watchers + 1; ++it)
     EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
   for(LifeCycleWatcher* it = watchers + 1; it != watchers + 3; ++it)
     EXPECT_EQ(LC_DESTROYED, it->life_cycle_state());
   for(LifeCycleWatcher* it = watchers + 3; it != watchers + arraysize(watchers);
       ++it)
     EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
 }
 
-// Assertions for push_back(scoped_ptr).
+// Assertions for push_back(unique_ptr).
 TEST(ScopedVectorTest, PushBackScopedPtr) {
   int delete_counter = 0;
   std::unique_ptr<DeleteCounter> elem(new DeleteCounter(&delete_counter));
   EXPECT_EQ(0, delete_counter);
   {
     ScopedVector<DeleteCounter> v;
     v.push_back(std::move(elem));
     EXPECT_EQ(0, delete_counter);
   }
   EXPECT_EQ(1, delete_counter);
 }
 
 }  // namespace