add KEY_FORWARD support

    Bug: 4395060

Change-Id: I68c11b6c8e963d8353ced2aaf296e618969c86e5
diff --git a/src/com/android/browser/Controller.java b/src/com/android/browser/Controller.java
index 83c4d61..7216d5e 100644
--- a/src/com/android/browser/Controller.java
+++ b/src/com/android/browser/Controller.java
@@ -2536,6 +2536,10 @@
                 if (!noModifiers) break;
                 event.startTracking();
                 return true;
+            case KeyEvent.KEYCODE_FORWARD:
+                if (!noModifiers) break;
+                tab.goForward();
+                return true;
             case KeyEvent.KEYCODE_DPAD_LEFT:
                 if (ctrl) {
                     tab.goBack();