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

Source/core/platform/Cookie.h

Index: Source/core/platform/Cookie.h
diff --git a/Source/core/platform/Cookie.h b/Source/core/platform/Cookie.h
index f236ef4278aa6428fc8d1e60fac0ad4a01260f68..287a990f62e8871efed48c0ef46cf6221d2a8fc4 100644
--- a/Source/core/platform/Cookie.h
+++ b/Source/core/platform/Cookie.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 Cookie_h
@@ -63,7 +63,7 @@ namespace WebCore {
 
     struct CookieHash {
         static unsigned hash(Cookie key)
-        { 
+        {
             return StringHash::hash(key.name) + StringHash::hash(key.domain) + StringHash::hash(key.path) + key.secure;
         }