Add UMA stats for AppCacheUpdateJob results.

webkit/browser/appcache/appcache_histograms.cc

Index: webkit/browser/appcache/appcache_histograms.cc
diff --git a/webkit/browser/appcache/appcache_histograms.cc b/webkit/browser/appcache/appcache_histograms.cc
index dd00eb9c382847bf4f62b1da5dd3ecd4c2a3940a..6b5299b7c4b9715ad8c29c7c30fb15f954eede18 100644
--- a/webkit/browser/appcache/appcache_histograms.cc
+++ b/webkit/browser/appcache/appcache_histograms.cc
@@ -8,6 +8,12 @@
 
 namespace appcache {
 
+static std::string OriginToCustomHistogramSuffix(const GURL& origin_url) {
+  if (origin_url.host() == "docs.google.com")
+    return ".Docs";
+  return std::string();
+}
+
 void AppCacheHistograms::CountInitResult(InitResultType init_result) {
   UMA_HISTOGRAM_ENUMERATION(
        "appcache.InitResult",
@@ -22,6 +28,24 @@ void AppCacheHistograms::CountCorruptionDetected() {
   UMA_HISTOGRAM_BOOLEAN("appcache.CorruptionDetected", true);
 }
 
+void AppCacheHistograms::CountUpdateJobResult(
+    AppCacheUpdateJob::ResultType result,
+    const GURL& origin_url) {
+  UMA_HISTOGRAM_ENUMERATION(
+       "appcache.UpdateJobResult",
+       result, AppCacheUpdateJob::NUM_UPDATE_JOB_RESULT_TYPES);
+
+  const std::string suffix = OriginToCustomHistogramSuffix(origin_url);

[michaeln, 2014/02/15 00:03:56]

This is copy/pasted from what idb does for open results.

[jsbell, 2014/02/15 00:23:54]

... which we swiped from HostToCustomHistogramSuffix in
content/renderer/render_thread_impl.cc

(Don't forget to add both variations to histograms.xml like we did at first)

+  if (!suffix.empty()) {
+    base::LinearHistogram::FactoryGet(
+        "appcache.UpdateJobResult" + suffix,
+        1,
+        AppCacheUpdateJob::NUM_UPDATE_JOB_RESULT_TYPES,
+        AppCacheUpdateJob::NUM_UPDATE_JOB_RESULT_TYPES + 1,
+        base::HistogramBase::kUmaTargetedHistogramFlag)->Add(result);
+  }
+}
+
 void AppCacheHistograms::CountCheckResponseResult(
     CheckResponseResultType result) {
   UMA_HISTOGRAM_ENUMERATION(
@@ -29,6 +53,7 @@ void AppCacheHistograms::CountCheckResponseResult(
        result, NUM_CHECK_RESPONSE_RESULT_TYPES);
 }
 
+

[jsbell, 2014/02/15 00:23:54]

Delete extra blank line

 void AppCacheHistograms::AddTaskQueueTimeSample(
     const base::TimeDelta& duration) {
   UMA_HISTOGRAM_TIMES("appcache.TaskQueueTime", duration);