Remove unused ImportProgressDialog.

chrome/browser/importer/importer_host.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_IMPORTER_IMPORTER_HOST_H_
 #define CHROME_BROWSER_IMPORTER_IMPORTER_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 37 matching lines @@
   void SetObserver(importer::ImporterProgressObserver* observer);
 
   // A series of functions invoked at the start, during and end of the import
   // process. The middle functions are notifications that the a harvesting of a
   // particular source of data (specified by |item|) is under way.
   void NotifyImportStarted();
   void NotifyImportItemStarted(importer::ImportItem item);
   void NotifyImportItemEnded(importer::ImportItem item);
   void NotifyImportEnded();
 
-  // When in headless mode, the importer will not show the warning dialog and
-  // the outcome is as if the user had canceled the import operation.
+  // When in headless mode, the importer will not show any warning dialog if
+  // a user action is required (e.g., Firefox profile is locked and user should
+  // close Firefox to continue) and the outcome is as if the user had canceled
+  // the import operation.
   void set_headless() { headless_ = true; }
   bool is_headless() const { return headless_; }
 
   void set_parent_window(gfx::NativeWindow parent_window) {
     parent_window_ = parent_window;
   }
 
   void set_browser(Browser* browser) { browser_ = browser; }
 
   // Starts the process of importing the settings and data depending on what the
@@ skipping 94 matching lines @@
   // The observer that we need to notify about changes in the import process.
   importer::ImporterProgressObserver* observer_;
 
   // Firefox profile lock.
   scoped_ptr<FirefoxProfileLock> firefox_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(ImporterHost);
 };
 
 #endif  // CHROME_BROWSER_IMPORTER_IMPORTER_HOST_H_