tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 1b11267a54572745b7af47f1d68c8f8d49ceecd0..2459c402be844ecf0192cdb8216c7b98c5a81641 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -23841,6 +23841,18 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="ServiceWorker.Database.Open"
+    enum="ServiceWorkerDatabaseStatus">
+  <owner>nhiroki@chromium.org</owner>
+  <summary>Records result of opening a database for ServiceWorker.</summary>
+</histogram>
+
+<histogram name="ServiceWorker.Database.OperationError"
+    enum="ServiceWorkerDatabaseStatus">
+  <owner>nhiroki@chromium.org</owner>
+  <summary>Records database operation errors in ServiceWorker.</summary>
+</histogram>
+
 <histogram name="Settings.DefaultSearchProvider" enum="OmniboxSearchEngine">
   <obsolete>
     Deprecated in Chrome 30.  Use Search.DefaultSearchProviderType instead.
@@ -42039,6 +42051,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="10" label="SERVICE_UTILITY_SEMANTIC_CAPS_FAILED"/>
 </enum>
 
+<enum name="ServiceWorkerDatabaseStatus" type="int">
+  <int value="0" label="STATUS_OK"/>
+  <int value="1" label="STATUS_ERROR_NOT_FOUND"/>
+  <int value="2" label="STATUS_ERROR_IO_ERROR"/>
+  <int value="3" label="STATUS_ERROR_CORRUPTED"/>
+  <int value="4" label="STATUS_ERROR_FAILED"/>
+  <int value="5" label="STATUS_ERROR_MAX"/>
+</enum>
+
 <enum name="SessionStartupPref" type="int">
   <int value="0" label="Open home page (unused)"/>
   <int value="1" label="Continue from last opened pages"/>