Use generated copy and compare for OriginalDisplay in ComputedStyle.

third_party/WebKit/Source/core/style/ComputedStyle.cpp

Index: third_party/WebKit/Source/core/style/ComputedStyle.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.cpp b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
index e36db7e577e543ae6023ccefd8b855df28555781..b222b4f2a2df73a515b9d9e35601b80403fbe0ad 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -344,7 +344,6 @@ void ComputedStyle::CopyNonInheritedFromCached(const ComputedStyle& other) {
   // See comments for each skipped flag below.
 
   // These are not generated in ComputedStyleBase
-  SetOriginalDisplay(other.OriginalDisplay());
   SetVerticalAlign(other.VerticalAlign());
   SetHasViewportUnits(other.HasViewportUnits());
   SetHasRemUnitsInternal(other.HasRemUnits());
@@ -478,8 +477,6 @@ bool ComputedStyle::LoadingCustomFontsEqual(const ComputedStyle& other) const {
 bool ComputedStyle::NonInheritedEqual(const ComputedStyle& other) const {
   // compare everything except the pseudoStyle pointer
   return ComputedStyleBase::NonInheritedEqual(other) &&
-         OriginalDisplay() ==
-             other.OriginalDisplay() &&  // Not generated in ComputedStyleBase
          VerticalAlign() == other.VerticalAlign() &&  // Not generated in
                                                       // ComputedStyleBase
          box_ == other.box_ &&