ToolbarModel: Supply offline page status.

components/toolbar/toolbar_model.h

 // Copyright 2012 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 COMPONENTS_TOOLBAR_TOOLBAR_MODEL_H_
 #define COMPONENTS_TOOLBAR_TOOLBAR_MODEL_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 42 matching lines @@
   virtual base::string16 GetSecureVerboseText() const = 0;
 
   // Returns the name of the EV cert holder.  This returns an empty string if
   // the security level is not EV_SECURE.
   virtual base::string16 GetEVCertName() const = 0;
 
   // Returns whether the URL for the current navigation entry should be
   // in the location bar.
   virtual bool ShouldDisplayURL() const = 0;
 
+  // Returns whether the page is an offline page, sourced from a cache of
+  // previously-downloaded content.
+  virtual bool IsOfflinePage() const = 0;
+
   // Whether the text in the omnibox is currently being edited.
   void set_input_in_progress(bool input_in_progress) {
     input_in_progress_ = input_in_progress;
   }
   bool input_in_progress() const { return input_in_progress_; }
 
  protected:
   ToolbarModel() : input_in_progress_(false) {}
 
  private:
   bool input_in_progress_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarModel);
 };
 
 #endif  // COMPONENTS_TOOLBAR_TOOLBAR_MODEL_H_