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

Source/core/page/FocusController.h

Index: Source/core/page/FocusController.h
diff --git a/Source/core/page/FocusController.h b/Source/core/page/FocusController.h
index 676489ba9adf14d156c4bcbf78176b9f9ea75191..96f2928ce3638f8a8283c0bb1a2e3ab4b29dfb2a 100644
--- a/Source/core/page/FocusController.h
+++ b/Source/core/page/FocusController.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 FocusController_h
@@ -69,7 +69,7 @@ public:
 
     bool setInitialFocus(FocusDirection, KeyboardEvent*);
     bool advanceFocus(FocusDirection, KeyboardEvent*, bool initialFocus = false);
-        
+
     bool setFocusedElement(Element*, PassRefPtr<Frame>, FocusDirection = FocusDirectionNone);
 
     void setActive(bool);
@@ -120,5 +120,5 @@ private:
 };
 
 } // namespace WebCore
-    
+
 #endif // FocusController_h