[ChromeOS] Show autofill popup after keyboard (if any) is shown.

ui/base/ime/input_method_base.h

Index: ui/base/ime/input_method_base.h
diff --git a/ui/base/ime/input_method_base.h b/ui/base/ime/input_method_base.h
index 4d732cdd0e4821ed8b3e19ffad4ceb09ec570235..2e842e0b4206fe32bc62e4b36fb00f308b32d2c5 100644
--- a/ui/base/ime/input_method_base.h
+++ b/ui/base/ime/input_method_base.h
@@ -52,6 +52,9 @@ class UI_BASE_EXPORT InputMethodBase
   int GetTextInputFlags() const override;
   bool CanComposeInline() const override;
   void ShowImeIfNeeded() override;
+  void SetSupportsOnScreenKeyboard(bool supported) override;
+  bool SupportsOnScreenKeyboard() const override;
+  void OnKeyboardBoundsUnchanged() override;
 
   void AddObserver(InputMethodObserver* observer) override;
   void RemoveObserver(InputMethodObserver* observer) override;
@@ -113,6 +116,7 @@ class UI_BASE_EXPORT InputMethodBase
   ObserverList<InputMethodObserver> observer_list_;
 
   bool system_toplevel_window_focused_;
+  bool on_screen_keyboard_supported_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodBase);
 };