Add an end to end test: virtual keyboard opens on click of text input

ui/keyboard/keyboard_controller.cc

Index: ui/keyboard/keyboard_controller.cc
diff --git a/ui/keyboard/keyboard_controller.cc b/ui/keyboard/keyboard_controller.cc
index 676da64d047e71106edad66bed6ce9436923b5f1..e0912a72d1b8c9fdec50c2ded0d21086bd688b3e 100644
--- a/ui/keyboard/keyboard_controller.cc
+++ b/ui/keyboard/keyboard_controller.cc
@@ -221,6 +221,10 @@ aura::Window* KeyboardController::GetContainerWindow() {
   return container_.get();
 }
 
+aura::Window* KeyboardController::GetContainerWindowWithoutCreationForTest() {
+  return container_.get();
+}
+
 void KeyboardController::NotifyKeyboardBoundsChanging(
     const gfx::Rect& new_bounds) {
   current_keyboard_bounds_ = new_bounds;