Unify all types of overflow-related clips for paint and hit testing.

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

 // Copyright 2014 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 "core/paint/BlockPainter.h"
 
 #include "core/editing/DragCaretController.h"
 #include "core/editing/FrameSelection.h"
 #include "core/layout/LayoutFlexibleBox.h"
 #include "core/layout/LayoutInline.h"
@@ skipping 24 matching lines @@
   if (!intersectsPaintRect(paintInfo, adjustedPaintOffset))
     return;
 
   PaintInfo localPaintInfo(paintInfo);
   PaintPhase originalPhase = localPaintInfo.phase;
 
   // There are some cases where not all clipped visual overflow is accounted
   // for.
   // FIXME: reduce the number of such cases.
   ContentsClipBehavior contentsClipBehavior = ForceContentsClip;
-  if (m_layoutBlock.hasOverflowClip() && !m_layoutBlock.hasControlClip() &&
+  if (m_layoutBlock.shouldClipOverflow() && !m_layoutBlock.hasControlClip() &&
       !m_layoutBlock.hasCaret())
     contentsClipBehavior = SkipContentsClipIfPossible;
 
   if (originalPhase == PaintPhaseOutline) {
     localPaintInfo.phase = PaintPhaseDescendantOutlinesOnly;
   } else if (shouldPaintSelfBlockBackground(originalPhase)) {
     localPaintInfo.phase = PaintPhaseSelfBlockBackgroundOnly;
     m_layoutBlock.paintObject(localPaintInfo, adjustedPaintOffset);
     if (shouldPaintDescendantBlockBackgrounds(originalPhase))
       localPaintInfo.phase = PaintPhaseDescendantBlockBackgroundsOnly;
@@ skipping 246 matching lines @@
 }
 
 void BlockPainter::paintContents(const PaintInfo& paintInfo,
                                  const LayoutPoint& paintOffset) {
   DCHECK(!m_layoutBlock.childrenInline());
   PaintInfo paintInfoForDescendants = paintInfo.forDescendants();
   m_layoutBlock.paintChildren(paintInfoForDescendants, paintOffset);
 }
 
 }  // namespace blink