Oilpan: fix build after r363998.

third_party/WebKit/Source/core/paint/PaintInvalidationCapableScrollableArea.cpp

 // Copyright 2015 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 "core/paint/PaintInvalidationCapableScrollableArea.h"
 
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/layout/LayoutBox.h"
@@ skipping 31 matching lines @@
         shouldInvalidateNewRect = true;
     }
     if (shouldInvalidateNewRect) {
         box.invalidatePaintUsingContainer(paintInvalidationContainer, newPaintInvalidationRect, PaintInvalidationScroll);
         box.enclosingLayer()->setNeedsRepaint();
         return true;
     }
     return false;
 }
 
-struct ScrollbarPaintInvalidationData {
-    Scrollbar* scrollbar;
-    GraphicsLayer* graphicsLayer;
-    LayoutRect& previousPaintInvalidatioRect;
-
-};
-
 static void invalidatePaintOfScrollbarIfNeeded(Scrollbar* scrollbar, GraphicsLayer* graphicsLayer, bool& previouslyWasOverlay, LayoutRect& previousPaintInvalidationRect, bool needsPaintInvalidationArg, LayoutBox& box, const PaintInvalidationState& paintInvalidationState, const LayoutBoxModelObject& paintInvalidationContainer)
 {
     bool isOverlay = scrollbar && scrollbar->isOverlayScrollbar();
 
     // Calculate paint invalidation rect of the scrollbar, except overlay composited scrollbars because we invalidate the graphics layer only.
     LayoutRect newPaintInvalidationRect;
     if (scrollbar && !(graphicsLayer && isOverlay))
         newPaintInvalidationRect = scrollControlPaintInvalidationRect(scrollbar->frameRect(), box, paintInvalidationState, paintInvalidationContainer);
 
     bool needsPaintInvalidation = needsPaintInvalidationArg;
@@ skipping 54 matching lines @@
 }
 
 void PaintInvalidationCapableScrollableArea::clearPreviousPaintInvalidationRects()
 {
     m_horizontalScrollbarPreviousPaintInvalidationRect = LayoutRect();
     m_verticalScrollbarPreviousPaintInvalidationRect = LayoutRect();
     m_scrollCornerPreviousPaintInvalidationRect = LayoutRect();
 }
 
 } // namespace blink