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

Source/core/dom/CharacterData.idl

Index: Source/core/dom/CharacterData.idl
diff --git a/Source/core/dom/CharacterData.idl b/Source/core/dom/CharacterData.idl
index 2e3262ceb8d158e9a5aed959b7c8145140a3df50..eb6bfe7e64ddffeac4b484166d90b1a1953c07c5 100644
--- a/Source/core/dom/CharacterData.idl
+++ b/Source/core/dom/CharacterData.idl
@@ -22,18 +22,18 @@ interface CharacterData : Node {
     [TreatNullAs=NullString] attribute DOMString data;
 
     readonly attribute unsigned long length;
-    
+
     [TreatReturnedNullStringAs=Null, RaisesException] DOMString substringData([IsIndex,Default=Undefined] optional unsigned long offset, [IsIndex,Default=Undefined] optional unsigned long length);
 
     void appendData([Default=Undefined] optional DOMString data);
 
-     [RaisesException] void insertData([IsIndex,Default=Undefined] optional unsigned long offset, 
+     [RaisesException] void insertData([IsIndex,Default=Undefined] optional unsigned long offset,
                                    [Default=Undefined] optional DOMString data);
 
-     [RaisesException] void deleteData([IsIndex,Default=Undefined] optional unsigned long offset, 
+     [RaisesException] void deleteData([IsIndex,Default=Undefined] optional unsigned long offset,
                                    [IsIndex,Default=Undefined] optional unsigned long length);
 
-     [RaisesException] void replaceData([IsIndex,Default=Undefined] optional unsigned long offset, 
+     [RaisesException] void replaceData([IsIndex,Default=Undefined] optional unsigned long offset,
                                     [IsIndex,Default=Undefined] optional unsigned long length,
                                     [Default=Undefined] optional DOMString data);
 };