keyboard: Update the visibility after tab-switch.

chrome/browser/tab_contents/tab_contents.h

 // Copyright (c) 2011 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 CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 724 matching lines @@
   // Immediately removes the fade.
   void CancelInstantFade();
 
   // Opens view-source tab for this contents.
   void ViewSource();
 
   // Gets the minimum/maximum zoom percent.
   int minimum_zoom_percent() const { return minimum_zoom_percent_; }
   int maximum_zoom_percent() const { return maximum_zoom_percent_; }
 
+  bool focused_field_is_editable() const {
+    return focused_field_is_editable_;
+  }
   int content_restrictions() const { return content_restrictions_; }
 
   AutocompleteHistoryManager* autocomplete_history_manager() {
     return autocomplete_history_manager_.get();
   }
   AutoFillManager* autofill_manager() { return autofill_manager_.get(); }
 
  protected:
   // from RenderViewHostDelegate.
   virtual bool OnMessageReceived(const IPC::Message& message);
@@ skipping 569 matching lines @@
   bool closed_by_user_gesture_;
 
   // Minimum/maximum zoom percent.
   int minimum_zoom_percent_;
   int maximum_zoom_percent_;
   // If true, the default zoom limits have been overriden for this tab, in which
   // case we don't want saved settings to apply to it and we don't want to
   // remember it.
   bool temporary_zoom_settings_;
 
+  // Whether the focused field in the tab is an editable field.
+  bool focused_field_is_editable_;

[sky, 2011/01/25 21:37:23]

You need to initialize this in the constructor.

+
   // A list of observers notified when page state changes. Weak references.
   ObserverList<WebNavigationObserver> web_navigation_observers_;
 
   // Content restrictions, used to disable print/copy etc based on content's
   // (full-page plugins for now only) permissions.
   int content_restrictions_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_