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

Source/core/dom/Range.idl

Index: Source/core/dom/Range.idl
diff --git a/Source/core/dom/Range.idl b/Source/core/dom/Range.idl
index 8418229e9e077ffd7a9129b61c2dd11da0eb0673..b34558fa0754a6a851d3d6d6598bb484cab08cc7 100644
--- a/Source/core/dom/Range.idl
+++ b/Source/core/dom/Range.idl
@@ -31,9 +31,9 @@
     [GetterRaisesException] readonly attribute boolean collapsed;
     [GetterRaisesException] readonly attribute Node commonAncestorContainer;
 
-     [RaisesException] void setStart([Default=Undefined] optional Node refNode, 
+     [RaisesException] void setStart([Default=Undefined] optional Node refNode,
                                  [Default=Undefined] optional long offset);
-     [RaisesException] void setEnd([Default=Undefined] optional Node refNode, 
+     [RaisesException] void setEnd([Default=Undefined] optional Node refNode,
                                [Default=Undefined] optional long offset);
     [RaisesException] void setStartBefore([Default=Undefined] optional Node refNode);
     [RaisesException] void setStartAfter([Default=Undefined] optional Node refNode);
@@ -83,10 +83,10 @@
     const unsigned short NODE_BEFORE_AND_AFTER = 2;
     const unsigned short NODE_INSIDE           = 3;
 
-    [RaisesException] short comparePoint([Default=Undefined] optional Node refNode, 
+    [RaisesException] short comparePoint([Default=Undefined] optional Node refNode,
                        [Default=Undefined] optional long offset);
 
-    [RaisesException] boolean isPointInRange([Default=Undefined] optional Node refNode, 
+    [RaisesException] boolean isPointInRange([Default=Undefined] optional Node refNode,
                            [Default=Undefined] optional long offset);
 
     [RaisesException] void expand([Default=Undefined] optional DOMString unit);