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

Source/core/dom/Event.h

Index: Source/core/dom/Event.h
diff --git a/Source/core/dom/Event.h b/Source/core/dom/Event.h
index 82e402d5319f6685c95528ef6430fa59688c8fa2..7875b1e2386ba683ba61e4bf6fec75dd87d1d1bd 100644
--- a/Source/core/dom/Event.h
+++ b/Source/core/dom/Event.h
@@ -39,18 +39,18 @@ class HTMLIFrameElement;
 
 struct EventInit {
     EventInit();
-     
+
     bool bubbles;
     bool cancelable;
 };
 
 class Event : public ScriptWrappable, public RefCounted<Event> {
 public:
-    enum PhaseType { 
+    enum PhaseType {
         NONE                = 0,
-        CAPTURING_PHASE     = 1, 
+        CAPTURING_PHASE     = 1,
         AT_TARGET           = 2,
-        BUBBLING_PHASE      = 3 
+        BUBBLING_PHASE      = 3
     };
 
     enum EventType {
@@ -92,7 +92,7 @@ public:
 
     const AtomicString& type() const { return m_type; }
     void setType(const AtomicString& type) { m_type = type; }
-    
+
     EventTarget* target() const { return m_target.get(); }
     void setTarget(PassRefPtr<EventTarget>);
 
@@ -108,7 +108,7 @@ public:
 
     void stopPropagation() { m_propagationStopped = true; }
     void stopImmediatePropagation() { m_immediatePropagationStopped = true; }
-    
+
     // IE Extensions
     EventTarget* srcElement() const { return target(); } // MSIE extension - "the object that fired the event"