Fix monkey NPE in AutoCompletePopup

 Bug 6554866

Change-Id: I2942e55d98bc768f5c5c563240c1841c7e869b3c

Author: George Mount

core/java/android/webkit/AutoCompletePopup.java

@@ -181,8 +181,11 @@ public void onItemClick(AdapterView<?> parent, View view, int position, long id)
                 // There is no autofill profile setup yet and the user has
                 // elected to try and set one up. Call through to the
                 // embedder to action that.
-                mWebView.getWebChromeClient().setupAutoFill(
+                WebChromeClient webChromeClient = mWebView.getWebChromeClient();
+                if (webChromeClient != null) {
+                    webChromeClient.setupAutoFill(
                         mHandler.obtainMessage(AUTOFILL_FORM));
+                }
             }
         } else {
             Object selectedItem;