[cc] Store CCLayerImpls as scoped_ptrs

cc/CCScrollbarAnimationControllerLinearFadeTest.cpp

 // 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.
 
 #include "config.h"
 
 #include "CCScrollbarAnimationControllerLinearFade.h"
 
 #include "CCScrollbarLayerImpl.h"
 #include "CCSingleThreadProxy.h"
@@ skipping 16 matching lines @@
         m_scrollLayer->setMaxScrollPosition(IntSize(50, 50));
         m_contentLayer->setBounds(IntSize(50, 50));
 
         m_scrollbarController = CCScrollbarAnimationControllerLinearFade::create(m_scrollLayer.get(), 2, 3);
         m_scrollbarController->setHorizontalScrollbarLayer(m_scrollbarLayer.get());
     }
 
     DebugScopedSetImplThread implThread;
 
     OwnPtr<CCScrollbarAnimationControllerLinearFade> m_scrollbarController;
-    OwnPtr<CCLayerImpl> m_scrollLayer;
+    scoped_ptr<CCLayerImpl> m_scrollLayer;
     CCLayerImpl* m_contentLayer;
-    OwnPtr<CCScrollbarLayerImpl> m_scrollbarLayer;
+    scoped_ptr<CCScrollbarLayerImpl> m_scrollbarLayer;
 
 };
 
 TEST_F(CCScrollbarAnimationControllerLinearFadeTest, verifyHiddenInBegin)
 {
     m_scrollbarController->animate(0);
     EXPECT_FLOAT_EQ(0, m_scrollbarLayer->opacity());
     m_scrollbarController->updateScrollOffsetAtTime(m_scrollLayer.get(), 0);
     m_scrollbarController->animate(0);
     EXPECT_FLOAT_EQ(0, m_scrollbarLayer->opacity());
@@ skipping 61 matching lines @@
     m_scrollbarController->animate(9);
     EXPECT_FLOAT_EQ(2 / 3.0f, m_scrollbarLayer->opacity());
     m_scrollbarController->animate(10);
     EXPECT_FLOAT_EQ(1 / 3.0f, m_scrollbarLayer->opacity());
     m_scrollbarController->animate(11);
     EXPECT_FLOAT_EQ(0, m_scrollbarLayer->opacity());
 
 }
 
 }