Protector histograms for default search provider change added.

chrome/browser/protector/histograms.h

Index: chrome/browser/protector/histograms.h
diff --git a/chrome/browser/protector/histograms.h b/chrome/browser/protector/histograms.h
index e00b814d17f57fd5167c83eb4b792a127259c6a3..ef4389b1c9be6cee014323ebf20afd279d85fcd2 100644
--- a/chrome/browser/protector/histograms.h
+++ b/chrome/browser/protector/histograms.h
@@ -6,6 +6,8 @@
 #define CHROME_BROWSER_PROTECTOR_HISTOGRAMS_H_
 #pragma once
 
+class TemplateURL;
+
 namespace protector {
 
 // Histogram name to report protection errors for the default search
@@ -26,7 +28,22 @@ enum ProtectorError {
   kProtectorErrorCount
 };
 
+// Histogram name to report the new default search provider.
+extern const char kProtectorHistogramNewSearchProvider[];
+// Histogram name to report when user accepts new default search provider.
+extern const char kProtectorHistogramSearchProviderApplied[];
+// Histogram name to report when user keeps previous default search provider.
+extern const char kProtectorHistogramSearchProviderDiscarded[];
+// Histogram name to report when user ignores search provider change.
+extern const char kProtectorHistogramSearchProviderTimeout[];
+
+// 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* t_url);
+
+// Maximum value of search provider index in histogram enums.
+extern const int kProtectorMaxSearchProviderID;
+
 }  // namespace protector
 
 #endif  // CHROME_BROWSER_PROTECTOR_HISTOGRAMS_H_
-