Protect against NULL PasswordStore

chrome/browser/profiles/profile.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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_H_
 #pragma once
 
@@ skipping 279 matching lines @@
   //
   // |access| defines what the caller plans to do with the service. See
   // the ServiceAccessType definition above.
   virtual WebDataService* GetWebDataService(ServiceAccessType access) = 0;
 
   // Similar to GetWebDataService(), but won't create the web data service if it
   // doesn't already exist.
   virtual WebDataService* GetWebDataServiceWithoutCreating() = 0;
 
   // Returns the PasswordStore for this profile. This is owned by the Profile.
+  // This may return NULL if the implementation is unable to create a
+  // password store (e.g. a corrupt database).
   virtual PasswordStore* GetPasswordStore(ServiceAccessType access) = 0;
 
   // Retrieves a pointer to the PrefService that manages the preferences
   // for this user profile.  The PrefService is lazily created the first
   // time that this method is called.
   virtual PrefService* GetPrefs() = 0;
 
   // Retrieves a pointer to the PrefService that manages the preferences
   // for OffTheRecord Profiles.  This PrefService is lazily created the first
   // time that this method is called.
@@ skipping 266 matching lines @@
   bool restored_last_session_;
 
   // Accessibility events will only be propagated when the pause
   // level is zero.  PauseAccessibilityEvents and ResumeAccessibilityEvents
   // increment and decrement the level, respectively, rather than set it to
   // true or false, so that calls can be nested.
   int accessibility_pause_level_;
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_H_