Do not zero-initialize RawPtr.

Source/core/css/parser/BisonCSSParser-in.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 844 matching lines @@
             return false;
     }
 
     CSSParserString cssString;
     cssString.init(string);
     CSSValueID valueID = cssValueKeywordID(cssString);
 
     if (!valueID)
         return false;
 
-    RefPtrWillBeRawPtr<CSSValue> value;
+    RefPtrWillBeRawPtr<CSSValue> value = nullptr;
     if (valueID == CSSValueInherit)
         value = cssValuePool().createInheritedValue();
     else if (valueID == CSSValueInitial)
         value = cssValuePool().createExplicitInitialValue();
     else if (isValidKeywordPropertyAndValue(propertyId, valueID, parserContext))
         value = cssValuePool().createIdentifierValue(valueID);
     else
         return false;
 
     declaration->addParsedProperty(CSSProperty(propertyId, value.release(), important));
@@ skipping 64 matching lines @@
 
     RefPtrWillBeRawPtr<CSSTransformValue> transformValue = CSSTransformValue::create(transformType);
     if (!parseTransformTranslateArguments(pos, end, expectedArgumentCount, transformValue.get()))
         return nullptr;
     return transformValue.release();
 }
 
 template <typename CharType>
 static PassRefPtrWillBeRawPtr<CSSValueList> parseTranslateTransformList(CharType*& pos, CharType* end)
 {
-    RefPtrWillBeRawPtr<CSSValueList> transformList;
+    RefPtrWillBeRawPtr<CSSValueList> transformList = nullptr;
     while (pos < end) {
         while (pos < end && isCSSSpace(*pos))
             ++pos;
         RefPtrWillBeRawPtr<CSSTransformValue> transformValue = parseTranslateTransformValue(pos, end);
         if (!transformValue)
             return nullptr;
         if (!transformList)
             transformList = CSSValueList::createSpaceSeparated();
         transformList->append(transformValue.release());
         if (pos < end) {
             if (isCSSSpace(*pos))
                 return nullptr;
         }
     }
     return transformList.release();
 }
 
 static bool parseTranslateTransform(MutableStylePropertySet* properties, CSSPropertyID propertyID, const String& string, bool important)
 {
     if (propertyID != CSSPropertyWebkitTransform)
         return false;
     if (string.isEmpty())
         return false;
-    RefPtrWillBeRawPtr<CSSValueList> transformList;
+    RefPtrWillBeRawPtr<CSSValueList> transformList = nullptr;
     if (string.is8Bit()) {
         const LChar* pos = string.characters8();
         const LChar* end = pos + string.length();
         transformList = parseTranslateTransformList(pos, end);
         if (!transformList)
             return false;
     } else {
         const UChar* pos = string.characters16();
         const UChar* end = pos + string.length();
         transformList = parseTranslateTransformList(pos, end);
@@ skipping 670 matching lines @@
         return 0;
     RefPtrWillBeRawPtr<StyleRuleImport> rule = StyleRuleImport::create(url, media);
     StyleRuleImport* result = rule.get();
     m_parsedRules.append(rule.release());
     return result;
 }
 
 StyleRuleBase* BisonCSSParser::createMediaRule(MediaQuerySet* media, RuleList* rules)
 {
     m_allowImportRules = m_allowNamespaceDeclarations = false;
-    RefPtrWillBeRawPtr<StyleRuleMedia> rule;
+    RefPtrWillBeRawPtr<StyleRuleMedia> rule = nullptr;
     if (rules) {
         rule = StyleRuleMedia::create(media ? media : MediaQuerySet::create().get(), *rules);
     } else {
         RuleList emptyRules;
         rule = StyleRuleMedia::create(media ? media : MediaQuerySet::create().get(), emptyRules);
     }
     StyleRuleMedia* result = rule.get();
     m_parsedRules.append(rule.release());
     return result;
 }
 
 StyleRuleBase* BisonCSSParser::createSupportsRule(bool conditionIsSupported, RuleList* rules)
 {
     m_allowImportRules = m_allowNamespaceDeclarations = false;
 
     RefPtr<CSSRuleSourceData> data = popSupportsRuleData();
-    RefPtrWillBeRawPtr<StyleRuleSupports> rule;
+    RefPtrWillBeRawPtr<StyleRuleSupports> rule = nullptr;
     String conditionText;
     unsigned conditionOffset = data->ruleHeaderRange.start + 9;
     unsigned conditionLength = data->ruleHeaderRange.length() - 9;
 
     if (m_tokenizer.is8BitSource())
         conditionText = String(m_tokenizer.m_dataStart8.get() + conditionOffset, conditionLength).stripWhiteSpace();
     else
         conditionText = String(m_tokenizer.m_dataStart16.get() + conditionOffset, conditionLength).stripWhiteSpace();
 
     if (rules) {
@@ skipping 512 matching lines @@
     rule->setProperties(createStylePropertySet());
     clearProperties();
 
     StyleRuleViewport* result = rule.get();
     m_parsedRules.append(rule.release());
 
     return result;
 }
 
 }