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

Source/core/loader/CrossOriginPreflightResultCache.cpp

Index: Source/core/loader/CrossOriginPreflightResultCache.cpp
diff --git a/Source/core/loader/CrossOriginPreflightResultCache.cpp b/Source/core/loader/CrossOriginPreflightResultCache.cpp
index 91e0c9466b8bc01e2115dd4b3aa81c34e64c5186..d13744050dbccaedabd068a602304157f88efda5 100644
--- a/Source/core/loader/CrossOriginPreflightResultCache.cpp
+++ b/Source/core/loader/CrossOriginPreflightResultCache.cpp
@@ -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.
  *
  */
 
@@ -61,7 +61,7 @@ static void addToAccessControlAllowList(const String& string, unsigned start, un
         ++start;
 
     // only white space
-    if (start > end) 
+    if (start > end)
         return;
 
     // Skip white space from end.