Page::chrome() should return a reference.

Source/core/page/Settings.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011, 2012 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 241 matching lines @@
     m_textAutosizingWindowSizeOverride = textAutosizingWindowSizeOverride;
     m_page->setNeedsRecalcStyleInAllFrames();
 }
 
 void Settings::setUseWideViewport(bool useWideViewport)
 {
     if (m_useWideViewport == useWideViewport)
         return;
 
     m_useWideViewport = useWideViewport;
-    if (m_page->chrome() && m_page->mainFrame())
-        m_page->chrome()->dispatchViewportPropertiesDidChange(m_page->mainFrame()->document()->viewportArguments());
+    if (m_page->mainFrame())
+        m_page->chrome().dispatchViewportPropertiesDidChange(m_page->mainFrame()->document()->viewportArguments());
 }
 
 void Settings::setLoadWithOverviewMode(bool loadWithOverviewMode)
 {
     if (m_loadWithOverviewMode == loadWithOverviewMode)
         return;
 
     m_loadWithOverviewMode = loadWithOverviewMode;
-    if (m_page->chrome() && m_page->mainFrame())
-        m_page->chrome()->dispatchViewportPropertiesDidChange(m_page->mainFrame()->document()->viewportArguments());
+    if (m_page->mainFrame())
+        m_page->chrome().dispatchViewportPropertiesDidChange(m_page->mainFrame()->document()->viewportArguments());
 }
 
 void Settings::setTextAutosizingFontScaleFactor(float fontScaleFactor)
 {
     m_textAutosizingFontScaleFactor = fontScaleFactor;
 
     // FIXME: I wonder if this needs to traverse frames like in WebViewImpl::resize, or whether there is only one document per Settings instance?
     for (Frame* frame = m_page->mainFrame(); frame; frame = frame->tree()->traverseNext())
         frame->document()->textAutosizer()->recalculateMultipliers();
 
@@ skipping 119 matching lines @@
     m_openGLMultisamplingEnabled = flag;
     m_page->multisamplingChanged();
 }
 
 bool Settings::openGLMultisamplingEnabled()
 {
     return m_openGLMultisamplingEnabled;
 }
 
 } // namespace WebCore