Do not zero-initialize RawPtr.

Source/bindings/v8/V8Binding.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 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 442 matching lines @@
 }
 
 float toFloat(v8::Handle<v8::Value> value, ExceptionState& exceptionState)
 {
     V8TRYCATCH_EXCEPTION_RETURN(v8::Local<v8::Number>, numberObject, value->ToNumber(), exceptionState, 0);
     return numberObject->NumberValue();
 }
 
 PassRefPtrWillBeRawPtr<XPathNSResolver> toXPathNSResolver(v8::Handle<v8::Value> value, v8::Isolate* isolate)
 {
-    RefPtrWillBeRawPtr<XPathNSResolver> resolver;
+    RefPtrWillBeRawPtr<XPathNSResolver> resolver = nullptr;
     if (V8XPathNSResolver::hasInstance(value, isolate))
         resolver = V8XPathNSResolver::toNative(v8::Handle<v8::Object>::Cast(value));
     else if (value->IsObject())
         resolver = V8CustomXPathNSResolver::create(value->ToObject(), isolate);
     return resolver;
 }
 
 DOMWindow* toDOMWindow(v8::Handle<v8::Value> value, v8::Isolate* isolate)
 {
     if (value.IsEmpty() || !value->IsObject())
@@ skipping 183 matching lines @@
 V8ExecutionScope::V8ExecutionScope(v8::Isolate* isolate)
     : m_handleScope(isolate)
     , m_context(v8::Context::New(isolate))
     , m_contextScope(m_context)
     , m_world(DOMWrapperWorld::create())
     , m_perContextData(V8PerContextData::create(m_context, m_world))
 {
 }
 
 } // namespace WebCore