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

Source/core/platform/PlatformGestureEvent.h

Index: Source/core/platform/PlatformGestureEvent.h
diff --git a/Source/core/platform/PlatformGestureEvent.h b/Source/core/platform/PlatformGestureEvent.h
index 4fdf619e414b8e003a40902a68382db9b1e89fe4..42f69b30aa79907c4427fae8a59ad6ae49f171be 100644
--- a/Source/core/platform/PlatformGestureEvent.h
+++ b/Source/core/platform/PlatformGestureEvent.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 PlatformGestureEvent_h
@@ -68,7 +68,7 @@ public:
 
     float deltaX() const { return m_deltaX; }
     float deltaY() const { return m_deltaY; }
-    
+
 protected:
     IntPoint m_position;
     IntPoint m_globalPosition;