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

Source/core/dom/ClientRect.h

Index: Source/core/dom/ClientRect.h
diff --git a/Source/core/dom/ClientRect.h b/Source/core/dom/ClientRect.h
index 9177a3f978eae9b56737a14ab2df71d2fbb32f14..6476e0f493ead987450b1be88952440f2f08854d 100644
--- a/Source/core/dom/ClientRect.h
+++ b/Source/core/dom/ClientRect.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.
  *
  */
 
@@ -34,7 +34,7 @@
 
 namespace WebCore {
 
-    class IntRect; 
+    class IntRect;
 
     class ClientRect : public ScriptWrappable, public RefCounted<ClientRect> {
     public:
@@ -55,7 +55,7 @@ namespace WebCore {
         explicit ClientRect(const FloatRect&);
 
         FloatRect m_rect;
-    }; 
+    };
 
 } // namespace WebCore