keyboard: Update the visibility after tab-switch.

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
diff --git a/chrome/browser/tab_contents/tab_contents.h b/chrome/browser/tab_contents/tab_contents.h
index d22eeec76583a6e3fb1b19f7afc34e1d6be55cd5..94ae3483bfe4901d6898256c433590181f040875 100644
--- a/chrome/browser/tab_contents/tab_contents.h
+++ b/chrome/browser/tab_contents/tab_contents.h
@@ -742,6 +742,9 @@ class TabContents : public PageNavigator,
   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() {
@@ -1331,6 +1334,9 @@ class TabContents : public PageNavigator,
   // 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_;