Clear the password field when reloading the current page.

Fixes http://b/issue?id=2119142

Change-Id: I14bfcc6873f295c4d24ef7ee10450fd444dbe82c

core/java/android/webkit/WebView.java

@@ -1394,6 +1394,7 @@ public class WebView extends AbsoluteLayout
      * Reload the current url.
      */
     public void reload() {
+        clearTextEntry();
         switchOutDrawHistory();
         mWebViewCore.sendMessage(EventHub.RELOAD);
     }