Limit display of the virtual keyboard to state changes triggered from a user gesture.

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 8e4355d35575fcce2de5c6fa68afb9831fd0d55b..d3432c9782dd1b5b280f28bc9e4d62e41ecb5ef7 100644
--- a/ui/base/ime/input_method_observer.h
+++ b/ui/base/ime/input_method_observer.h
@@ -39,6 +39,10 @@ class UI_BASE_EXPORT InputMethodObserver {
 
   // Called when the observed InputMethod is being destroyed.
   virtual void OnInputMethodDestroyed(const InputMethod* input_method) = 0;
+
+  // 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;
 };
 
 }  // namespace ui