Rename Blink constants generated from IDL files.

third_party/WebKit/Source/core/css/CSSFontFaceRule.h

Index: third_party/WebKit/Source/core/css/CSSFontFaceRule.h
diff --git a/third_party/WebKit/Source/core/css/CSSFontFaceRule.h b/third_party/WebKit/Source/core/css/CSSFontFaceRule.h
index 5237eab8fe505112babef4f8bf7fcce78b02bcfc..f8201d738c38b60e84e938a16d372696388da38e 100644
--- a/third_party/WebKit/Source/core/css/CSSFontFaceRule.h
+++ b/third_party/WebKit/Source/core/css/CSSFontFaceRule.h
@@ -53,13 +53,13 @@ public:
 private:
     CSSFontFaceRule(StyleRuleFontFace*, CSSStyleSheet* parent);
 
-    CSSRule::Type type() const override { return FONT_FACE_RULE; }
+    CSSRule::Type type() const override { return kFontFaceRule; }
 
     Member<StyleRuleFontFace> m_fontFaceRule;
     mutable Member<StyleRuleCSSStyleDeclaration> m_propertiesCSSOMWrapper;
 };
 
-DEFINE_CSS_RULE_TYPE_CASTS(CSSFontFaceRule, FONT_FACE_RULE);
+DEFINE_CSS_RULE_TYPE_CASTS(CSSFontFaceRule, kFontFaceRule);
 
 } // namespace blink