Cloud print signin crash.

chrome/browser/printing/cloud_print/cloud_print_setup_flow.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/browser/printing/cloud_print/cloud_print_setup_flow.h"
 
 #include "base/json/json_writer.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 27 matching lines @@
 #include "ui/gfx/font.h"
 
 static const wchar_t kGaiaLoginIFrameXPath[] = L"//iframe[@id='gaialogin']";
 static const wchar_t kDoneIframeXPath[] = L"//iframe[@id='setupdone']";
 
 ////////////////////////////////////////////////////////////////////////////////
 // CloudPrintSetupFlow implementation.
 
 // static
 CloudPrintSetupFlow* CloudPrintSetupFlow::OpenDialog(
-    Profile* profile, Delegate* delegate, gfx::NativeWindow parent_window) {
+    Profile* profile, const base::WeakPtr<Delegate>& delegate,
+    gfx::NativeWindow parent_window) {
   DCHECK(profile);
   // Set the arguments for showing the gaia login page.
   DictionaryValue args;
   args.SetString("user", "");
   args.SetInteger("error", 0);
   args.SetBoolean("editable_user", true);
 
   bool setup_done = false;
   if (profile->GetPrefs()->HasPrefPath(prefs::kCloudPrintEmail) &&
       !profile->GetPrefs()->GetString(prefs::kCloudPrintEmail).empty())
@@ skipping 11 matching lines @@
   // using a browser.
   if (!parent_window) {
     Browser* browser = BrowserList::GetLastActive();
     if (browser && browser->window())
       parent_window = browser->window()->GetNativeHandle();
   }
   browser::ShowHtmlDialog(parent_window, profile, flow);
   return flow;
 }
 
-CloudPrintSetupFlow::CloudPrintSetupFlow(const std::string& args,
-                                         Profile* profile,
-                                         Delegate* delegate,
-                                         bool setup_done)
+CloudPrintSetupFlow::CloudPrintSetupFlow(
+    const std::string& args,
+    Profile* profile,
+    const base::WeakPtr<Delegate>& delegate,
+    bool setup_done)
     : web_ui_(NULL),
       dialog_start_args_(args),
       setup_done_(setup_done),
       process_control_(NULL),
       delegate_(delegate) {
   // TODO(hclam): The data source should be added once.
   profile_ = profile;
   profile->GetChromeURLDataManager()->AddDataSource(
       new CloudPrintSetupSource());
 }
@@ skipping 197 matching lines @@
 
 void CloudPrintSetupFlow::ExecuteJavascriptInIFrame(
     const std::wstring& iframe_xpath,
     const std::wstring& js) {
   if (web_ui_) {
     RenderViewHost* rvh = web_ui_->tab_contents()->render_view_host();
     rvh->ExecuteJavascriptInWebFrame(WideToUTF16Hack(iframe_xpath),
                                      WideToUTF16Hack(js));
   }
 }