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

Source/bindings/tests/idls/TestObject.idl

Index: Source/bindings/tests/idls/TestObject.idl
diff --git a/Source/bindings/tests/idls/TestObject.idl b/Source/bindings/tests/idls/TestObject.idl
index 61d4dfa54453df8941f5add9178f71292fe65480..8152b66d030cde9528cb00c441fc8f8c54808d8e 100644
--- a/Source/bindings/tests/idls/TestObject.idl
+++ b/Source/bindings/tests/idls/TestObject.idl
@@ -108,11 +108,11 @@ callback TestCallbackFunction = void (TestEnumType formal1, TestObject formal2);
     [Custom, MeasureAs=CustomTestFeature] void customMethod();
     [Custom] void customMethodWithArgs(long longArg, DOMString strArg, TestObject objArg);
 
-    void addEventListener(DOMString type, 
-                          EventListener listener, 
+    void addEventListener(DOMString type,
+                          EventListener listener,
                           optional boolean useCapture);
-    void removeEventListener(DOMString type, 
-                             EventListener listener, 
+    void removeEventListener(DOMString type,
+                             EventListener listener,
                              optional boolean useCapture);
 
     // 'CallWith' extended attribute
@@ -184,7 +184,7 @@ callback TestCallbackFunction = void (TestEnumType formal1, TestObject formal2);
 
     readonly attribute any cachedAttribute1;
     readonly attribute any cachedAttribute2;
-    
+
     attribute any anyAttribute;
 
     attribute TestCallbackFunction callbackFunctionAttribute;