Remove CachedUAStyle::hasAppearance.

Source/core/rendering/style/CachedUAStyle.h

Index: Source/core/rendering/style/CachedUAStyle.h
diff --git a/Source/core/rendering/style/CachedUAStyle.h b/Source/core/rendering/style/CachedUAStyle.h
index 610e095aa9e571c66568709b72ca65b410183dd8..df8c4eb8d97944775e1d0315b12e08f2f59e9408 100644
--- a/Source/core/rendering/style/CachedUAStyle.h
+++ b/Source/core/rendering/style/CachedUAStyle.h
@@ -37,19 +37,16 @@ public:
         return adoptPtr(new CachedUAStyle(style));
     }
 
-    bool hasAppearance;
     BorderData border;
     FillLayer backgroundLayers;
     StyleColor backgroundColor;
 
 private:
     explicit CachedUAStyle(const RenderStyle* style)
-        : hasAppearance(true)
-        , border(style->border())
+        : border(style->border())
         , backgroundLayers(style->backgroundLayers())
         , backgroundColor(style->backgroundColor())
     {
-        ASSERT(style->hasAppearance());
     }
 };