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

ui/base/ime/input_method_observer.h

Index: ui/base/ime/input_method_observer.h
diff --git a/ui/base/ime/input_method_observer.h b/ui/base/ime/input_method_observer.h
index d3432c9782dd1b5b280f28bc9e4d62e41ecb5ef7..e72fd7a2199728ad9445d80bb29de7730e01ec84 100644
--- a/ui/base/ime/input_method_observer.h
+++ b/ui/base/ime/input_method_observer.h
@@ -43,6 +43,10 @@ class UI_BASE_EXPORT InputMethodObserver {
   // Called when a user gesture should trigger showing the virtual keyboard
   // or alternate input view (e.g. handwriting palette). Used in ChromeOS.
   virtual void OnShowImeIfNeeded() = 0;
+
+  // Called by an on screen keyboard controller when the on screen keyboard was
+  // requested to be shown, but was already showing.
+  virtual void OnKeyboardBoundsUnchanged() = 0;
 };
 
 }  // namespace ui