Moving disableBrowserAutocomplete to WidgetUtil and change widgets to use it (#12020)

* Add autocomplete prevention to DateField

Autocomplete popup will interfere DateField's own popup

* Adding disableBrowserAutocomplete(..) in WidgetUtil

* Change VComboBox to use WidgetUtil.disableBrowserAutocomplete(..)

* Change to use WidgetUtil.disableBrowserAutocomplete(..)

* Change VFilterSelect to use WidgetUtil.disableBrowserAutocomplete(..)

* Adding WidgetUtil.disableBrowserAutocomplete to VTextualDate

* Adding missing import

* Adding missing import

client/src/main/java/com/vaadin/client/WidgetUtil.java

 import com.google.gwt.user.client.EventListener;
 import com.google.gwt.user.client.Window;
 import com.google.gwt.user.client.ui.RootPanel;
+import com.google.gwt.user.client.ui.TextBox;
 import com.google.gwt.user.client.ui.Widget;
 import com.vaadin.shared.ui.ErrorLevel;
 import com.vaadin.shared.util.SharedUtil;
             return indicator;
         }
     }
+
+    public static void disableBrowserAutocomplete(TextBox textBox) {
+        /*-
+         * Stop the browser from showing its own suggestion popup.
+         *
+         * Using an invalid value instead of "off" as suggested by
+         * https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion
+         *
+         * Leaving the non-standard Safari options autocapitalize and
+         * autocorrect untouched since those do not interfere in the same
+         * way, and they might be useful in a combo box where new items are
+         * allowed.
+         */
+        if (BrowserInfo.get().isChrome()) {
+            // Chrome supports "off" and random number does not work with
+            // Chrome
+            textBox.getElement().setAttribute("autocomplete", "off");
+        } else {
+        	textBox.getElement().setAttribute("autocomplete", Math.random() + "");
+        }    	
+    }
 }

client/src/main/java/com/vaadin/client/ui/VAbstractTextualDate.java

 import com.vaadin.client.Focusable;
 import com.vaadin.client.LocaleNotLoadedException;
 import com.vaadin.client.LocaleService;
+import com.vaadin.client.WidgetUtil;
 import com.vaadin.client.ui.aria.AriaHelper;
 import com.vaadin.client.ui.aria.HandlesAriaCaption;
 import com.vaadin.client.ui.aria.HandlesAriaInvalid;
         if (BrowserInfo.get().isIE()) {
             addDomHandler(this, KeyDownEvent.getType());
         }
+        // Stop the browser from showing its own suggestion popup.
+        WidgetUtil.disableBrowserAutocomplete(text);
         add(text);
         publishJSHelpers(getElement());
     }

client/src/main/java/com/vaadin/client/ui/VComboBox.java

          * @since 7.6.4
          */
         public FilterSelectTextBox() {
-            /*-
-             * Stop the browser from showing its own suggestion popup.
-             *
-             * Using an invalid value instead of "off" as suggested by
-             * https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion
-             *
-             * Leaving the non-standard Safari options autocapitalize and
-             * autocorrect untouched since those do not interfere in the same
-             * way, and they might be useful in a combo box where new items are
-             * allowed.
-             */
-            if (BrowserInfo.get().isChrome()) {
-                // Chrome supports "off" and random number does not work with
-                // Chrome
-                getElement().setAttribute("autocomplete", "off");
-            } else {
-                getElement().setAttribute("autocomplete", Math.random() + "");
-            }
+            WidgetUtil.disableBrowserAutocomplete(this);
         }
 
         /**

compatibility-client/src/main/java/com/vaadin/v7/client/ui/VFilterSelect.java

          * @since 7.6.4
          */
         public FilterSelectTextBox() {
-            /*-
-             * Stop the browser from showing its own suggestion popup.
-             *
-             * Using an invalid value instead of "off" as suggested by
-             * https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion
-             *
-             * Leaving the non-standard Safari options autocapitalize and
-             * autocorrect untouched since those do not interfere in the same
-             * way, and they might be useful in a combo box where new items are
-             * allowed.
-             */
-            if (BrowserInfo.get().isChrome()) {
-                // Chrome supports "off" and random number does not work with Chrome
-                getElement().setAttribute("autocomplete", "off");        		
-            } else {
-                getElement().setAttribute("autocomplete", Math.random() + "");
-            }
+            // Stop the browser from showing its own suggestion popup.
+            WidgetUtil.disableBrowserAutocomplete(this);
         }
 
         /**

compatibility-client/src/main/java/com/vaadin/v7/client/ui/VTextualDate.java

 import com.vaadin.client.Focusable;
 import com.vaadin.client.LocaleNotLoadedException;
 import com.vaadin.client.LocaleService;
+import com.vaadin.client.WidgetUtil;
 import com.vaadin.client.ui.SubPartAware;
 import com.vaadin.client.ui.aria.AriaHelper;
 import com.vaadin.client.ui.aria.HandlesAriaCaption;
         if (BrowserInfo.get().isIE()) {
             addDomHandler(this, KeyDownEvent.getType());
         }
+        // Stop the browser from showing its own suggestion popup.
+        WidgetUtil.disableBrowserAutocomplete(text);
         add(text);
     }