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

Source/core/html/HTMLVideoElement.h

Index: Source/core/html/HTMLVideoElement.h
diff --git a/Source/core/html/HTMLVideoElement.h b/Source/core/html/HTMLVideoElement.h
index bf598aa91c8fad2122a6d60f427d2629644a48f1..b668bae7078cfcab9d87f6a561e1bc5c746a2ae4 100644
--- a/Source/core/html/HTMLVideoElement.h
+++ b/Source/core/html/HTMLVideoElement.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 HTMLVideoElement_h
@@ -39,10 +39,10 @@ public:
 
     unsigned width() const;
     unsigned height() const;
-    
+
     unsigned videoWidth() const;
     unsigned videoHeight() const;
-    
+
     // Fullscreen
     void webkitEnterFullscreen(ExceptionCode&);
     void webkitExitFullscreen();