Remove custom style building functions for 'clip'.

Source/core/css/resolver/StyleBuilderConverter.cpp

Index: Source/core/css/resolver/StyleBuilderConverter.cpp
diff --git a/Source/core/css/resolver/StyleBuilderConverter.cpp b/Source/core/css/resolver/StyleBuilderConverter.cpp
index e25942f7d5636c7f4f4a1aa29009fa95403d43ab..8ef1c6b4acc93c9b061fdf9fec42454d83c619e9 100644
--- a/Source/core/css/resolver/StyleBuilderConverter.cpp
+++ b/Source/core/css/resolver/StyleBuilderConverter.cpp
@@ -34,6 +34,7 @@
 #include "core/css/CSSReflectValue.h"
 #include "core/css/CSSShadowValue.h"
 #include "core/css/Pair.h"
+#include "core/css/Rect.h"
 #include "core/svg/SVGURIReference.h"
 
 namespace blink {
@@ -91,6 +92,16 @@ AtomicString StyleBuilderConverter::convertFragmentIdentifier(StyleResolverState
     return nullAtom;
 }
 
+LengthBox StyleBuilderConverter::convertClip(StyleResolverState& state, CSSValue* value)
+{
+    Rect* rect = toCSSPrimitiveValue(value)->getRectValue();
+
+    return LengthBox(convertLengthOrAuto(state, rect->top()),
+        convertLengthOrAuto(state, rect->right()),
+        convertLengthOrAuto(state, rect->bottom()),
+        convertLengthOrAuto(state, rect->left()));
+}
+
 PassRefPtr<FontFeatureSettings> StyleBuilderConverter::convertFontFeatureSettings(StyleResolverState& state, CSSValue* value)
 {
     if (value->isPrimitiveValue() && toCSSPrimitiveValue(value)->getValueID() == CSSValueNormal)