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

Source/core/dom/TextEvent.idl

Index: Source/core/dom/TextEvent.idl
diff --git a/Source/core/dom/TextEvent.idl b/Source/core/dom/TextEvent.idl
index 10ec19ad4db88704dbafda2e9f266a78fec6f553..3d03594e04329f6c0602db409354ba0c9f2a7ab2 100644
--- a/Source/core/dom/TextEvent.idl
+++ b/Source/core/dom/TextEvent.idl
@@ -9,7 +9,7 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -20,7 +20,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // Introduced in DOM Level 3:
@@ -28,10 +28,10 @@ interface TextEvent : UIEvent {
 
     readonly attribute DOMString data;
 
-    void initTextEvent([Default=Undefined] optional DOMString typeArg, 
-                       [Default=Undefined] optional boolean canBubbleArg, 
-                       [Default=Undefined] optional boolean cancelableArg, 
-                       [Default=Undefined] optional Window viewArg, 
+    void initTextEvent([Default=Undefined] optional DOMString typeArg,
+                       [Default=Undefined] optional boolean canBubbleArg,
+                       [Default=Undefined] optional boolean cancelableArg,
+                       [Default=Undefined] optional Window viewArg,
                        [Default=Undefined] optional DOMString dataArg);
 
 };