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..94d467fac6bd6bdb30537512ec080d998efa124d 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;
@@ -22,7 +23,8 @@ class AppCacheHistograms {
   static void CountInitResult(InitResultType init_result);
   static void CountReinitAttempt(bool repeated_attempt);
   static void CountCorruptionDetected();
-
+  static void CountUpdateJobResult(AppCacheUpdateJob::ResultType result,
+                                   const GURL& origin_url);
   enum CheckResponseResultType {
     RESPONSE_OK, MANIFEST_OUT_OF_DATE, RESPONSE_OUT_OF_DATE, ENTRY_NOT_FOUND,
     READ_HEADERS_ERROR, READ_DATA_ERROR, UNEXPECTED_DATA_SIZE, CHECK_CANCELED,