Code problems detected by cppcheck

Source/core/page/DragController.cpp

 /*
  * Copyright (C) 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc.
  *
  * 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 92 matching lines @@
     case DragSourceActionNone:
         return false;
     }
     // Make sure MSVC doesn't complain that not all control paths return a value.
     return false;
 }
 #endif
 
 static PlatformMouseEvent createMouseEvent(DragData* dragData)
 {
-    bool shiftKey, ctrlKey, altKey, metaKey;
-    shiftKey = ctrlKey = altKey = metaKey = false;
     int keyState = dragData->modifierKeyState();
-    shiftKey = static_cast<bool>(keyState & PlatformEvent::ShiftKey);
-    ctrlKey = static_cast<bool>(keyState & PlatformEvent::CtrlKey);
-    altKey = static_cast<bool>(keyState & PlatformEvent::AltKey);
-    metaKey = static_cast<bool>(keyState & PlatformEvent::MetaKey);
+    bool shiftKey = static_cast<bool>(keyState & PlatformEvent::ShiftKey);
+    bool ctrlKey = static_cast<bool>(keyState & PlatformEvent::CtrlKey);
+    bool altKey = static_cast<bool>(keyState & PlatformEvent::AltKey);
+    bool metaKey = static_cast<bool>(keyState & PlatformEvent::MetaKey);
 
     return PlatformMouseEvent(dragData->clientPosition(), dragData->globalPosition(),
                               LeftButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey,
                               metaKey, currentTime());
 }
 
 static PassRefPtr<Clipboard> createDraggingClipboard(ClipboardAccessPolicy policy, DragData* dragData)
 {
     return Clipboard::create(Clipboard::DragAndDrop, policy, dragData->platformData());
 }
@@ skipping 829 matching lines @@
     return false;
 #endif
 }
 
 void DragController::cleanupAfterSystemDrag()
 {
 }
 
 } // namespace WebCore