[protector] Added SessionStartupChange for representing changes in SessionStartupPref.

chrome/browser/protector/histograms.h

 // Copyright (c) 2012 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_PROTECTOR_HISTOGRAMS_H_
 #define CHROME_BROWSER_PROTECTOR_HISTOGRAMS_H_
 #pragma once
 
 class TemplateURL;
 
@@ skipping 29 matching lines @@
 extern const char kProtectorHistogramSearchProviderHijacked[];
 // Histogram name to report when the prepopulated default search provider was
 // missing and has been added for fallback.
 extern const char kProtectorHistogramSearchProviderMissing[];
 // Histogram name to report the default search provider restored by Protector
 // before showing user the bubble.
 extern const char kProtectorHistogramSearchProviderRestored[];
 // Histogram name to report when user ignores search provider change.
 extern const char kProtectorHistogramSearchProviderTimeout[];
 
+// Histogram name to report when user accepts new startup settings.
+extern const char kProtectorHistogramStartupSettingsApplied[];
+// Histogram name to report the new startup settings when the backup is
+// valid and a change is detected.
+extern const char kProtectorHistogramStartupSettingsChanged[];
+// Histogram name to report when keeps previous startup settings.
+extern const char kProtectorHistogramStartupSettingsDiscarded[];
+// Histogram name to report when user ignores startup settings change.
+extern const char kProtectorHistogramStartupSettingsTimeout[];
+
+// Maximum value of search provider index in histogram enums.
+extern const int kProtectorMaxSearchProviderID;
+
 // Returns index to be used in histograms for given search provider (which may
 // be NULL, in which case a special index will be returned).
 int GetSearchProviderHistogramID(const TemplateURL* turl);
 
-// Maximum value of search provider index in histogram enums.
-extern const int kProtectorMaxSearchProviderID;
-
 }  // namespace protector
 
 #endif  // CHROME_BROWSER_PROTECTOR_HISTOGRAMS_H_