needsPaintInvalidation() should not return true for selection.

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

Index: third_party/WebKit/Source/core/style/StyleDifference.h
diff --git a/third_party/WebKit/Source/core/style/StyleDifference.h b/third_party/WebKit/Source/core/style/StyleDifference.h
index a646e54bb1e584102df98292b2971d1198e628bc..1c622066d032d997f67430b0d18cdcf846974a0f 100644
--- a/third_party/WebKit/Source/core/style/StyleDifference.h
+++ b/third_party/WebKit/Source/core/style/StyleDifference.h
@@ -51,17 +51,17 @@ class StyleDifference {
            !(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.
@@ -150,7 +150,7 @@ class StyleDifference {
  private:
   enum PaintInvalidationType {
     NoPaintInvalidation,
-    PaintInvalidationSelection,
+    PaintInvalidationSelectionOnly,
     PaintInvalidationObject,
     PaintInvalidationSubtree,
   };