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

ui/views/controls/textfield/textfield.h

Index: ui/views/controls/textfield/textfield.h
diff --git a/ui/views/controls/textfield/textfield.h b/ui/views/controls/textfield/textfield.h
index 782a0b48b548d3e1569d6d44e13667ed5af26732..94d98aef09a615c8acdd77b2ea0d6b3a148e5f32 100644
--- a/ui/views/controls/textfield/textfield.h
+++ b/ui/views/controls/textfield/textfield.h
@@ -131,6 +131,9 @@ class VIEWS_EXPORT Textfield : public View,
     placeholder_text_color_ = color;
   }
 
+  // Displays a virtual keyboard or alternate input view if enabled.
+  void ShowImeIfNeeded();
+
   // Returns whether or not an IME is composing text.
   bool IsIMEComposing() const;