[wip] simplify -webkit-appearance adjust step

Source/core/rendering/RenderTheme.h

Index: Source/core/rendering/RenderTheme.h
diff --git a/Source/core/rendering/RenderTheme.h b/Source/core/rendering/RenderTheme.h
index ddb311b8ea799278805ccbdc64b2d69ea498b6f1..18dd31d4e97948d1d53df01b9de69d1da8bfd722 100644
--- a/Source/core/rendering/RenderTheme.h
+++ b/Source/core/rendering/RenderTheme.h
@@ -29,7 +29,6 @@
 #include "platform/ThemeTypes.h"
 #endif
 #include "core/rendering/RenderObject.h"
-#include "core/rendering/style/CachedUAStyle.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
@@ -62,7 +61,7 @@ public:
     // metrics and defaults given the contents of the style.  This includes sophisticated operations like
     // selection of control size based off the font, the disabling of appearance when certain other properties like
     // "border" are set, or if the appearance is not supported by the theme.
-    void adjustStyle(RenderStyle*, Element*, const CachedUAStyle*);
+    void adjustStyle(RenderStyle*, Element*, bool uaStyleHasWebkitAppearance, bool valuesUnchangedForWebkitAppearance);
 
     // This method is called to paint the widget as a background of the RenderObject.  A widget's foreground, e.g., the
     // text of a button, is always rendered by the engine itself.  The boolean return value indicates
@@ -94,7 +93,7 @@ public:
     virtual bool controlSupportsTints(const RenderObject*) const { return false; }
 
     // Whether or not the control has been styled enough by the author to disable the native appearance.
-    virtual bool isControlStyled(const RenderStyle*, const CachedUAStyle*) const;
+    bool isControlStyled(const RenderStyle*, bool valuesUnchangedForWebkitAppearance) const;
 
     // A general method asking if any control tinting is supported at all.
     virtual bool supportsControlTints() const { return false; }