Simulate variation seeds using installed version string.

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/timer.h"
+#include "base/version.h"
 #include "chrome/browser/upgrade_detector.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 class UpgradeDetectorImpl : public UpgradeDetector {
  public:
   virtual ~UpgradeDetectorImpl();
 
+  // Returns the currently installed Chrome version, which may be newer than the
+  // one currently running. Not supported on Android, iOS or ChromeOS. Must be
+  // run on a thread where I/O operations are allowed (e.g. FILE thread).
+  static base::Version GetCurrentlyInstalledVersion();
+
   // Returns the singleton instance.
   static UpgradeDetectorImpl* GetInstance();
 
  private:
   friend struct DefaultSingletonTraits<UpgradeDetectorImpl>;
 
   UpgradeDetectorImpl();
 
   // Start the timer that will call |CheckForUpgrade()|.
   void StartTimerForUpgradeCheck();
@@ skipping 41 matching lines @@
   bool is_auto_update_enabled_;
 
   // The date the binaries were built.
   base::Time build_date_;
 
   DISALLOW_COPY_AND_ASSIGN(UpgradeDetectorImpl);
 };
 
 
 #endif  // CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_