Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/indexeddb/IDBEventDispatcher.cpp

Index: Source/modules/indexeddb/IDBEventDispatcher.cpp
diff --git a/Source/modules/indexeddb/IDBEventDispatcher.cpp b/Source/modules/indexeddb/IDBEventDispatcher.cpp
index 6396eaa628c2a6c7e931853c41b7b74e510e2a1d..c057639b985241c5ce816afae6417b1870357a46 100644
--- a/Source/modules/indexeddb/IDBEventDispatcher.cpp
+++ b/Source/modules/indexeddb/IDBEventDispatcher.cpp
@@ -72,9 +72,9 @@ bool IDBEventDispatcher::dispatch(Event* event, Vector<RefPtr<EventTarget> >& ev
     //        prevent the transaction from being aborted. It's purely there for
     //        error reporting and distinctly different from the event propagating to
     //        the window.
-    //        
+    //
     //        This is similar to how "error" events are handled in workers.
-    //        
+    //
     //        (I think that so far webkit hasn't implemented the window.onerror
     //        feature yet, so you probably don't want to fire the separate error
     //        event on the window until that has been implemented)." -- Jonas Sicking