Delete selection gap code.

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/frame/Settings.h"
 #include "core/layout/LayoutBlockFlow.h"
@@ skipping 22 matching lines @@
     LayoutPoint adjustedPaintOffset = paintOffset + m_layoutBlock.location();
     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() && !(m_layoutBlock.shouldPaintSelectionGaps() && originalPhase == PaintPhaseForeground) && !m_layoutBlock.hasCaret())
+    if (m_layoutBlock.hasOverflowClip() && !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 197 matching lines @@
             ObjectPainter(m_layoutBlock).paintInlineChildrenOutlines(paintInfo, paintOffset);
         else
             LineBoxListPainter(m_layoutBlock.lineBoxes()).paint(m_layoutBlock, paintInfo, paintOffset);
     } else {
         PaintInfo paintInfoForDescendants = paintInfo.forDescendants();
         m_layoutBlock.paintChildren(paintInfoForDescendants, paintOffset);
     }
 }
 
 } // namespace blink