needsPaintInvalidation() should not return true for selection.

third_party/WebKit/Source/core/style/StyleDifference.h

 // 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.
 
 #ifndef StyleDifference_h
 #define StyleDifference_h
 
 #include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
 
@@ skipping 33 matching lines @@
            (!m_recomputeOverflow && !m_scrollAnchorDisablingPropertyChanged));
     return result;
   }
 
   bool hasAtMostPropertySpecificDifferences(
       unsigned propertyDifferences) const {
     return !m_paintInvalidationType && !m_layoutType &&
            !(m_propertySpecificDifferences & ~propertyDifferences);
   }
 
-  bool needsPaintInvalidation() const {
-    return m_paintInvalidationType != NoPaintInvalidation;
+  bool needsFullPaintInvalidation() const {
+    return m_paintInvalidationType > PaintInvalidationSelectionOnly;
   }
 
   // The text selection needs paint invalidation.
   bool needsPaintInvalidationSelection() const {
-    return m_paintInvalidationType == PaintInvalidationSelection;
+    return m_paintInvalidationType == PaintInvalidationSelectionOnly;
   }
   void setNeedsPaintInvalidationSelection() {
-    if (!needsPaintInvalidation())
-      m_paintInvalidationType = PaintInvalidationSelection;
+    if (!needsFullPaintInvalidation())
+      m_paintInvalidationType = PaintInvalidationSelectionOnly;
   }
 
   // The object just needs to issue paint invalidations.
   bool needsPaintInvalidationObject() const {
     return m_paintInvalidationType == PaintInvalidationObject;
   }
   void setNeedsPaintInvalidationObject() {
     DCHECK(!needsPaintInvalidationSubtree());
     m_paintInvalidationType = PaintInvalidationObject;
   }
@@ skipping 68 matching lines @@
   bool scrollAnchorDisablingPropertyChanged() const {
     return m_scrollAnchorDisablingPropertyChanged;
   }
   void setScrollAnchorDisablingPropertyChanged() {
     m_scrollAnchorDisablingPropertyChanged = true;
   }
 
  private:
   enum PaintInvalidationType {
     NoPaintInvalidation,
-    PaintInvalidationSelection,
+    PaintInvalidationSelectionOnly,
     PaintInvalidationObject,
     PaintInvalidationSubtree,
   };
   unsigned m_paintInvalidationType : 2;
 
   enum LayoutType { NoLayout = 0, PositionedMovement, FullLayout };
   unsigned m_layoutType : 2;
   unsigned m_recomputeOverflow : 1;
   unsigned m_propertySpecificDifferences : 7;
   unsigned m_scrollAnchorDisablingPropertyChanged : 1;
 };
 
 }  // namespace blink
 
 #endif  // StyleDifference_h