Split Dictionary's get and convert into DictionaryHelper.

Source/core/css/FontFace.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 92 matching lines @@
     return parsedStyle->getPropertyCSSValue(propertyID);
 }
 
 static bool initFontFace(FontFace* fontFace, ExecutionContext* context, const AtomicString& family, const Dictionary& descriptors, ExceptionState& exceptionState)
 {
     fontFace->setFamily(context, family, exceptionState);
     if (exceptionState.hadException())
         return false;
 
     String value;
-    if (descriptors.get("style", value)) {
+    if (DictionaryHelper::get(descriptors, "style", value)) {
         fontFace->setStyle(context, value, exceptionState);
         if (exceptionState.hadException())
             return false;
     }
-    if (descriptors.get("weight", value)) {
+    if (DictionaryHelper::get(descriptors, "weight", value)) {
         fontFace->setWeight(context, value, exceptionState);
         if (exceptionState.hadException())
             return false;
     }
-    if (descriptors.get("stretch", value)) {
+    if (DictionaryHelper::get(descriptors, "stretch", value)) {
         fontFace->setStretch(context, value, exceptionState);
         if (exceptionState.hadException())
             return false;
     }
-    if (descriptors.get("unicodeRange", value)) {
+    if (DictionaryHelper::get(descriptors, "unicodeRange", value)) {
         fontFace->setUnicodeRange(context, value, exceptionState);
         if (exceptionState.hadException())
             return false;
     }
-    if (descriptors.get("variant", value)) {
+    if (DictionaryHelper::get(descriptors, "variant", value)) {
         fontFace->setVariant(context, value, exceptionState);
         if (exceptionState.hadException())
             return false;
     }
-    if (descriptors.get("featureSettings", value)) {
+    if (DictionaryHelper::get(descriptors, "featureSettings", value)) {
         fontFace->setFeatureSettings(context, value, exceptionState);
         if (exceptionState.hadException())
             return false;
     }
     return true;
 }
 
 PassRefPtrWillBeRawPtr<FontFace> FontFace::create(ExecutionContext* context, const AtomicString& family, const String& source, const Dictionary& descriptors, ExceptionState& exceptionState)
 {
     RefPtrWillBeRawPtr<CSSValue> src = parseCSSValue(toDocument(context), source, CSSPropertySrc);
@@ skipping 481 matching lines @@
     visitor->trace(m_cssFontFace);
     visitor->trace(m_callbacks);
 }
 
 bool FontFace::hadBlankText() const
 {
     return m_cssFontFace->hadBlankText();
 }
 
 } // namespace WebCore