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

ui/keyboard/keyboard_controller.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 34 matching lines @@
   };
 
   // Takes ownership of |proxy|.
   explicit KeyboardController(KeyboardControllerProxy* proxy);
   virtual ~KeyboardController();
 
   // Returns the container for the keyboard, which is owned by
   // KeyboardController.
   aura::Window* GetContainerWindow();
 
+  // Whether the container window for the keyboard has been initialized.
+  bool keyboard_container_initialized() const {
+    return container_.get() != NULL;
+  }
+
   // Sets the override content url. This is used by for input view for extension
   // IMEs.
   void SetOverrideContentUrl(const GURL& url);
 
   // Hides virtual keyboard and notifies observer bounds change.
   // This function should be called with a delay to avoid layout flicker
   // when the focus of input field quickly change. |automatic| is true when the
   // call is made by the system rather than initiated by the user.
   void HideKeyboard(HideReason reason);
 
@@ skipping 20 matching lines @@
   virtual void OnTextInputTypeChanged(
       const ui::TextInputClient* client) OVERRIDE {}
   virtual void OnFocus() OVERRIDE {}
   virtual void OnBlur() OVERRIDE {}
   virtual void OnCaretBoundsChanged(
       const ui::TextInputClient* client) OVERRIDE {}
   virtual void OnTextInputStateChanged(
       const ui::TextInputClient* client) OVERRIDE;
   virtual void OnInputMethodDestroyed(
       const ui::InputMethod* input_method) OVERRIDE;
+  virtual void OnShowImeIfNeeded() OVERRIDE;
 
   // Returns true if keyboard is scheduled to hide.
   bool WillHideKeyboard() const;
 
   scoped_ptr<KeyboardControllerProxy> proxy_;
   scoped_ptr<aura::Window> container_;
   ui::InputMethod* input_method_;
   bool keyboard_visible_;
   bool lock_keyboard_;
 
   ObserverList<KeyboardControllerObserver> observer_list_;
 
   base::WeakPtrFactory<KeyboardController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardController);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_H_