Change infobar creation to use a public static Create() method on the infobar delegate classes.

chrome/browser/ui/startup/session_crashed_prompt.h

Index: chrome/browser/ui/startup/session_crashed_prompt.h
===================================================================
--- chrome/browser/ui/startup/session_crashed_prompt.h	(revision 175396)
+++ chrome/browser/ui/startup/session_crashed_prompt.h	(working copy)
@@ -5,13 +5,43 @@
 #ifndef CHROME_BROWSER_UI_STARTUP_SESSION_CRASHED_PROMPT_H_
 #define CHROME_BROWSER_UI_STARTUP_SESSION_CRASHED_PROMPT_H_
 
+#include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
 class Browser;
 
-namespace chrome {
+// A delegate for the InfoBar shown when the previous session has crashed.
+class SessionCrashedInfoBarDelegate : public ConfirmInfoBarDelegate,
+                                      public content::NotificationObserver {
+ public:
+  // If |browser| is not incognito, creates a session crashed delegate and adds
+  // it to the InfoBarService for |browser|.
+  static void Create(Browser* browser);
 
-// Shows the session crashed prompt for |browser| if required.
-void ShowSessionCrashedPrompt(Browser* browser);
+ private:
+  SessionCrashedInfoBarDelegate(InfoBarService* infobar_service,
+                                Browser* browser);
+  virtual ~SessionCrashedInfoBarDelegate();
 
-}  // namespace chrome
+  // ConfirmInfoBarDelegate:
+  virtual gfx::Image* GetIcon() const OVERRIDE;
+  virtual string16 GetMessageText() const OVERRIDE;
+  virtual int GetButtons() const OVERRIDE;
+  virtual string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
+  virtual bool Accept() OVERRIDE;
 
+  // content::NotificationObserver:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  content::NotificationRegistrar registrar_;
+  bool accepted_;
+  bool removed_notification_received_;
+  Browser* browser_;
+
+  DISALLOW_COPY_AND_ASSIGN(SessionCrashedInfoBarDelegate);
+};
+
 #endif  // CHROME_BROWSER_UI_STARTUP_SESSION_CRASHED_PROMPT_H_