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

Source/core/page/DragActions.h

Index: Source/core/page/DragActions.h
diff --git a/Source/core/page/DragActions.h b/Source/core/page/DragActions.h
index c9793f33072d84693b3c24378e54db5fcbdf0783..d98c9c40e2ae737393a3ae792f4830925120f043 100644
--- a/Source/core/page/DragActions.h
+++ b/Source/core/page/DragActions.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 DragActions_h
@@ -38,7 +38,7 @@ namespace WebCore {
         DragDestinationActionLoad    = 4,
         DragDestinationActionAny     = UINT_MAX
     } DragDestinationAction;
-    
+
     // WebCoreDragSourceAction should be kept in sync with WebDragSourceAction
     typedef enum {
         DragSourceActionNone         = 0,
@@ -47,7 +47,7 @@ namespace WebCore {
         DragSourceActionLink         = 4,
         DragSourceActionSelection    = 8,
     } DragSourceAction;
-    
+
     //matches NSDragOperation
     typedef enum {
         DragOperationNone    = 0,
@@ -59,7 +59,7 @@ namespace WebCore {
         DragOperationDelete  = 32,
         DragOperationEvery   = UINT_MAX
     } DragOperation;
-    
+
 }
 
 #endif // !DragActions_h