Make EventHandler to use VisibleSelection::toNormalizedEphemeralRange() instead of toNormalizedRange

Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * 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.
@@ skipping 1636 matching lines @@
             break;
     }
     ASSERT(!element || element->isMouseFocusable());
 
     // To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus
     // a node on mouse down if it's selected and inside a focused node. It will
     // be focused if the user does a mouseup over it, however, because the
     // mouseup will set a selection inside it, which will call
     // FrameSelection::setFocusedNodeIfNeeded.
     if (element && m_frame->selection().isRange()) {
-        if (m_frame->selection().toNormalizedRange()->isNodeFullyContained(*element)
+        // TODO(yosin) We should not create |Range| object for calling
+        // |isNodeFullyContained()|.
+        if (createRange(m_frame->selection().selection().toNormalizedEphemeralRange())->isNodeFullyContained(*element)
             && element->isDescendantOf(m_frame->document()->focusedElement()))
             return false;
     }
 
 
     // Only change the focus when clicking scrollbars if it can transfered to a
     // mouse focusable node.
     if (!element && targetedEvent.hitTestResult().scrollbar())
         return true;
 
@@ skipping 2321 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink