Cloud print signin crash.

chrome/browser/printing/cloud_print/cloud_print_setup_handler.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_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_HANDLER_H_
+#define CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_HANDLER_H_
+#pragma once
+
+#include "base/weak_ptr.h"
+#include "chrome/browser/printing/cloud_print/cloud_print_setup_flow.h"
+
+// Cloud Print setup handler.
+// Provides a weak pointer adapter so that callers of
+// CloudPrintSetupFlow::OpenDialog can still be notified when the dialog
+// completes, but don't have to stick around until the end. Lifetime should be
+// shorter than that of it's owner.
+class CloudPrintSetupHandler
+    : public CloudPrintSetupFlow::Delegate,
+      public base::SupportsWeakPtr<CloudPrintSetupHandler> {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    // Called when the setup dialog is closed.
+    virtual void OnCloudPrintSetupClosed() = 0;
+  };
+
+  explicit CloudPrintSetupHandler(Delegate* handler);
+  virtual ~CloudPrintSetupHandler();
+
+  // CloudPrintSetupFlow::Delegate implementation.
+  virtual void OnDialogClosed();
+
+ private:
+  Delegate* handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(CloudPrintSetupHandler);
+};
+
+#endif  // CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_HANDLER_H_