Fix a back forward bug in ChromeFrame reported on the field. The bug occurs when multiple

chrome_frame/chrome_frame_automation.cc

 // 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.
 
 #include "chrome_frame/chrome_frame_automation.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
@@ skipping 1145 matching lines @@
          SRCCOPY);
 
   ::ReleaseDC(tab_window_, window_dc);
 }
 
 void ChromeFrameAutomationClient::PrintTab() {
   if (tab_)
     tab_->PrintAsync();
 }
 
-bool ChromeFrameAutomationClient::Reinitialize(
-    ChromeFrameDelegate* delegate,
-    PluginUrlRequestManager* url_fetcher) {
-  if (url_fetcher_) {
-    // Clean up any outstanding requests
-    url_fetcher_->StopAllRequests();
-    url_fetcher_ = NULL;
-  }
-
-  if (!tab_.get() || !::IsWindow(chrome_window_)) {
-    NOTREACHED();
-    DLOG(WARNING) << "ChromeFrameAutomationClient instance reused "
-                  << "with invalid tab";
-    return false;
-  }
-
-  if (!delegate) {
-    NOTREACHED();
-    return false;
-  }
-
-  chrome_frame_delegate_ = delegate;
-  DeleteAllPendingTasks();
-  SetUrlFetcher(url_fetcher);
-  SetParentWindow(NULL);
-  return true;
-}
-
 void ChromeFrameAutomationClient::AttachExternalTab(
     uint64 external_tab_cookie) {
   DCHECK_EQ(static_cast<TabProxy*>(NULL), tab_.get());
   DCHECK_EQ(-1, tab_handle_);
 
   external_tab_cookie_ = external_tab_cookie;
 }
 
 void ChromeFrameAutomationClient::BlockExternalTab(uint64 cookie) {
   // The host does not want this tab to be shown (due popup blocker).
@@ skipping 83 matching lines @@
     const net::URLRequestStatus& status) {
   automation_server_->Send(new AutomationMsg_RequestEnd(
       tab_->handle(), request_id, status));
 }
 
 void ChromeFrameAutomationClient::OnCookiesRetrieved(bool success,
     const GURL& url, const std::string& cookie_string, int cookie_id) {
   automation_server_->Send(new AutomationMsg_GetCookiesHostResponse(
       tab_->handle(), success, url, cookie_string, cookie_id));
 }