Stop using [InterfaceName] in CSS IDL files

Source/core/core.gypi

Index: Source/core/core.gypi
diff --git a/Source/core/core.gypi b/Source/core/core.gypi
index 5bf3a28e8ade090a5e95389dc62f3c0c491df5ab..f87ed8bcd4696d57f0791beede4750beb713f8bb 100644
--- a/Source/core/core.gypi
+++ b/Source/core/core.gypi
@@ -3,27 +3,19 @@
         'core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
-            'css/CSSFilterRule.idl',
-            'css/CSSFilterValue.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
-            'css/CSSKeyframeRule.idl',
-            'css/CSSKeyframesRule.idl',
-            'css/CSSMatrix.idl',
             'css/CSSMediaRule.idl',
-            'css/CSSMixFunctionValue.idl',
             'css/CSSPageRule.idl',
             'css/CSSPrimitiveValue.idl',
-            'css/CSSRegionRule.idl',
             'css/CSSRule.idl',
             'css/CSSRuleList.idl',
             'css/CSSStyleDeclaration.idl',
             'css/CSSStyleRule.idl',
             'css/CSSStyleSheet.idl',
             'css/CSSSupportsRule.idl',
-            'css/CSSTransformValue.idl',
             # We should probably add CSSUnknownRule.idl to this list,
             # but it currently causes a compile error.
             # 'css/CSSUnknownRule.idl',
@@ -39,6 +31,14 @@
             'css/StyleMedia.idl',
             'css/StyleSheet.idl',
             'css/StyleSheetList.idl',
+            'css/WebKitCSSFilterRule.idl',
+            'css/WebKitCSSFilterValue.idl',
+            'css/WebKitCSSKeyframeRule.idl',
+            'css/WebKitCSSKeyframesRule.idl',
+            'css/WebKitCSSMatrix.idl',
+            'css/WebKitCSSMixFunctionValue.idl',
+            'css/WebKitCSSRegionRule.idl',
+            'css/WebKitCSSTransformValue.idl',
             'dom/AnimationEvent.idl',
             'dom/Attr.idl',
             'dom/AutocompleteErrorEvent.idl',