Oilpan: add missing pointer initialization after r357529.

third_party/WebKit/Source/web/InspectorOverlay.cpp

 /*
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 396 matching lines @@
     result->setNumber("height", size.height());
     return result.release();
 }
 
 void InspectorOverlay::drawNodeHighlight()
 {
     if (!m_highlightNode)
         return;
 
     String selectors = m_nodeHighlightConfig.selectorList;
-    RefPtrWillBeRawPtr<StaticElementList> elements;
+    RefPtrWillBeRawPtr<StaticElementList> elements = nullptr;
     TrackExceptionState exceptionState;
     if (selectors.length())
         elements = m_highlightNode->ownerDocument()->querySelectorAll(AtomicString(selectors), exceptionState);
     if (elements && !exceptionState.hadException()) {
         for (unsigned i = 0; i < elements->length(); ++i) {
             Element* element = elements->item(i);
             InspectorHighlight highlight(element, m_nodeHighlightConfig, false);
             RefPtr<JSONObject> highlightJSON = highlight.asJSONObject();
             evaluateInOverlay("drawHighlight", highlightJSON.release());
         }
@@ skipping 343 matching lines @@
 
 void InspectorOverlay::initializeLayoutEditorIfNeeded(Node* node)
 {
     if (node && node->isElementNode() && m_inspectMode == InspectorDOMAgent::ShowLayoutEditor && !m_layoutEditor) {
         m_layoutEditor = LayoutEditor::create(toElement(node), m_cssAgent, m_domAgent, &overlayMainFrame()->script());
         toChromeClientImpl(m_webViewImpl->page()->chromeClient()).setCursorOverridden(true);
     }
 }
 
 } // namespace blink