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

base/debug/leak_tracker_unittest.cc

 // Copyright (c) 2011 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/debug/leak_tracker.h"
 
 #include <memory>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 12 matching lines @@
   LeakTracker<ClassB> leak_tracker_;
 };
 
 #ifndef ENABLE_LEAK_TRACKER
 
 // If leak tracking is disabled, we should do nothing.
 TEST(LeakTrackerTest, NotEnabled) {
   EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances());
   EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances());
 
-  // Use scoped_ptr so compiler doesn't complain about unused variables.
+  // Use unique_ptr so compiler doesn't complain about unused variables.
   std::unique_ptr<ClassA> a1(new ClassA);
   std::unique_ptr<ClassB> b1(new ClassB);
   std::unique_ptr<ClassB> b2(new ClassB);
 
   EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances());
   EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances());
 }
 
 #else
 
@@ skipping 62 matching lines @@
   // There are no live instances of ClassA, so this should do nothing.
   LeakTracker<ClassA>::CheckForLeaks();
 }
 
 #endif  // ENABLE_LEAK_TRACKER
 
 }  // namespace
 
 }  // namespace debug
 }  // namespace base