Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/dom/UIEventWithKeyState.h

Index: Source/core/dom/UIEventWithKeyState.h
diff --git a/Source/core/dom/UIEventWithKeyState.h b/Source/core/dom/UIEventWithKeyState.h
index 64fca1fef428eae6691e844f959880e1a82ecd2f..bcf9a8090f855373cdfa02153a7025ec6108bf0d 100644
--- a/Source/core/dom/UIEventWithKeyState.h
+++ b/Source/core/dom/UIEventWithKeyState.h
@@ -27,7 +27,7 @@
 #include "core/dom/UIEvent.h"
 
 namespace WebCore {
-    
+
     class UIEventWithKeyState : public UIEvent {
     public:
         bool ctrlKey() const { return m_ctrlKey; }
@@ -43,7 +43,7 @@ namespace WebCore {
             , m_metaKey(false)
         {
         }
-        
+
         UIEventWithKeyState(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<AbstractView> view,
                             int detail, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
             : UIEvent(type, canBubble, cancelable, view, detail)