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

Source/core/dom/DOMImplementation.idl

Index: Source/core/dom/DOMImplementation.idl
diff --git a/Source/core/dom/DOMImplementation.idl b/Source/core/dom/DOMImplementation.idl
index 0040c117e7d27d193517ba258d22ae28f9f2514a..0d627f502f92107592dfa2d34ac0c0801e7d6ea0 100644
--- a/Source/core/dom/DOMImplementation.idl
+++ b/Source/core/dom/DOMImplementation.idl
@@ -24,7 +24,7 @@
 
     // DOM Level 1
 
-     boolean hasFeature([Default=Undefined] optional DOMString feature, 
+     boolean hasFeature([Default=Undefined] optional DOMString feature,
                                       [TreatNullAs=NullString,Default=Undefined] optional DOMString version);
 
     // DOM Level 2
@@ -32,8 +32,8 @@
      [RaisesException] DocumentType createDocumentType([TreatNullAs=NullString, TreatUndefinedAs=NullString,Default=Undefined] optional DOMString qualifiedName,
                                                    [TreatNullAs=NullString, TreatUndefinedAs=NullString,Default=Undefined] optional DOMString publicId,
                                                    [TreatNullAs=NullString, TreatUndefinedAs=NullString,Default=Undefined] optional DOMString systemId);
-     [RaisesException] Document createDocument([TreatNullAs=NullString,Default=Undefined] optional DOMString namespaceURI, 
-                                           [TreatNullAs=NullString,Default=Undefined] optional DOMString qualifiedName, 
+     [RaisesException] Document createDocument([TreatNullAs=NullString,Default=Undefined] optional DOMString namespaceURI,
+                                           [TreatNullAs=NullString,Default=Undefined] optional DOMString qualifiedName,
                                            [TreatNullAs=NullString,Default=Undefined] optional DocumentType doctype);
 
     // DOMImplementationCSS interface from DOM Level 2 CSS