use new SkEvent notion of passing targetID to constructor

git-svn-id: http://skia.googlecode.com/svn/trunk@2042 2bbb7eff-a529-9590-31e7-b0007b416f81

src/utils/unix/SkOSWindow_Unix.cpp

@@ -222,10 +222,8 @@ void SkOSWindow::onSetTitle(const char title[])
     XSetWMName(fUnixWindow.fDisplay, fUnixWindow.fWin, &textProp);
 }
 
-void SkOSWindow::onHandleInval(const SkIRect&)
-{
-    SkEvent* evt = new SkEvent("inval-imageview");
-    evt->post(getSinkID());
+void SkOSWindow::onHandleInval(const SkIRect&) {
+    (new SkEvent("inval-imageview", this->getSinkID()))->post();
 }
 
 bool SkOSWindow::onEvent(const SkEvent& evt)