Add an outdated upgrade bubble view.

chrome/browser/upgrade_detector_impl.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_UPGRADE_DETECTOR_IMPL_H_
 #define CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
 
 #include "base/memory/weak_ptr.h"
 #include "base/timer.h"
 #include "chrome/browser/upgrade_detector.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 class UpgradeDetectorImpl : public UpgradeDetector {
  public:
   virtual ~UpgradeDetectorImpl();
 
   // Returns the singleton instance.
   static UpgradeDetectorImpl* GetInstance();
 
  private:
   friend struct DefaultSingletonTraits<UpgradeDetectorImpl>;
 
   UpgradeDetectorImpl();
 
+  // Start the timer that will call |CheckForUpgrade()|.
+  void StartTimerForUpgradeCheck();
+
   // Launches a task on the file thread to check if we have the latest version.
   void CheckForUpgrade();
 
   // Sends out a notification and starts a one shot timer to wait until
   // notifying the user.
-  void UpgradeDetected();
+  void UpgradeDetected(UpgradeAvailable upgrade_available);
+
+  // Returns true after calling UpgradeDetected if current install is outdated.
+  bool DetectOutdatedInstall();
 
   // The function that sends out a notification (after a certain time has
   // elapsed) that lets the rest of the UI know we should start notifying the
   // user that a new version is available.
   void NotifyOnUpgrade();
 
+  // Called on the FILE thread to detect an upgrade. Calls back UpgradeDetected
+  // on the UI thread if so. Although it looks weird, this needs to be a static
+  // method receiving a WeakPtr<> to this object so that we can interrupt
+  // the UpgradeDetected callback before it runs. Having this method non-static
+  // and using |this| directly wouldn't be thread safe. And keeping it as a
+  // non-class function would prevent it from calling UpgradeDetected.
+  static void DetectUpgradeTask(
+      base::WeakPtr<UpgradeDetectorImpl> upgrade_detector);
+
   // We periodically check to see if Chrome has been upgraded.
   base::RepeatingTimer<UpgradeDetectorImpl> detect_upgrade_timer_;
 
   // After we detect an upgrade we start a recurring timer to see if enough time
   // has passed and we should start notifying the user.
   base::RepeatingTimer<UpgradeDetectorImpl> upgrade_notification_timer_;
 
   // We use this factory to create callback tasks for UpgradeDetected. We pass
   // the task to the actual upgrade detection code, which is in
   // DetectUpgradeTask.
   base::WeakPtrFactory<UpgradeDetectorImpl> weak_factory_;
 
   // True if this build is a dev or canary channel build.
   bool is_unstable_channel_;
 
+  // The date the binaries were built.
+  base::Time build_date_;
+
   DISALLOW_COPY_AND_ASSIGN(UpgradeDetectorImpl);
 };
 
 
 #endif  // CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_