Add UMA stats for AppCacheUpdateJob results.

webkit/browser/appcache/appcache_histograms.h

Index: webkit/browser/appcache/appcache_histograms.h
diff --git a/webkit/browser/appcache/appcache_histograms.h b/webkit/browser/appcache/appcache_histograms.h
index 7718ae1f1e114ab98552d76545da787000635da0..e05d5ccc87fbdc1ab24990bcb8d720f49b8deed7 100644
--- a/webkit/browser/appcache/appcache_histograms.h
+++ b/webkit/browser/appcache/appcache_histograms.h
@@ -6,6 +6,7 @@
 #define WEBKIT_BROWSER_APPCACHE_APPCACHE_HISTOGRAMS_H_
 
 #include "base/basictypes.h"
+#include "webkit/browser/appcache/appcache_update_job.h"
 
 namespace base {
 class TimeDelta;
@@ -30,6 +31,8 @@ class AppCacheHistograms {
   };
   static void CountCheckResponseResult(CheckResponseResultType result);
 
+  static void CountUpdateJobResult(AppCacheUpdateJob::ResultType result);
+
   static void AddTaskQueueTimeSample(const base::TimeDelta& duration);
   static void AddTaskRunTimeSample(const base::TimeDelta& duration);
   static void AddCompletionQueueTimeSample(const base::TimeDelta& duration);