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

Source/core/loader/SinkDocument.h

Index: Source/core/loader/SinkDocument.h
diff --git a/Source/core/loader/SinkDocument.h b/Source/core/loader/SinkDocument.h
index e68bc45551e86fcab6df413a9f8767cfc2fcca5f..3421775e603c27736d7ef7f0fcb28828c1cf6c80 100644
--- a/Source/core/loader/SinkDocument.h
+++ b/Source/core/loader/SinkDocument.h
@@ -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.
  */
 
 #ifndef SinkDocument_h
@@ -39,7 +39,7 @@ public:
 
 private:
     SinkDocument(const DocumentInit&);
-    
+
     virtual PassRefPtr<DocumentParser> createParser();
 };