Rewrite references to "wtf/" to "platform/wtf/" in platform/scroll.

third_party/WebKit/Source/platform/scroll/ScrollbarTestSuite.h

 // Copyright 2016 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 ScrollbarTestSuite_h
 #define ScrollbarTestSuite_h
 
+#include <memory>
 #include "platform/heap/GarbageCollected.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/Scrollbar.h"
 #include "platform/scroll/ScrollbarThemeMock.h"
+#include "platform/wtf/PtrUtil.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebThread.h"
 #include "testing/gmock/include/gmock/gmock.h"
-#include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
 class MockScrollableArea : public GarbageCollectedFinalized<MockScrollableArea>,
                            public ScrollableArea {
   USING_GARBAGE_COLLECTED_MIXIN(MockScrollableArea);
 
  public:
   static MockScrollableArea* create() { return new MockScrollableArea(); }
 
@@ skipping 59 matching lines @@
     m_maximumScrollOffset = maximumScrollOffset;
   }
 
   ScrollOffset m_scrollOffset;
   ScrollOffset m_maximumScrollOffset;
 };
 
 }  // namespace blink
 
 #endif