Follow up for issue 490583 for changing histogram name and enum name for notification..

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 ec03e58ec6d168eb277dc84930a1802f28dd51b0..2e00f7543adff32c45ac33de306d1e2e8e81547e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -25716,6 +25716,27 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Notifications.PersistentNotificationDataDeleted"
+    enum="BooleanSuccess">
+  <owner>peter@chromium.org</owner>
+  <owner>deepak.m1@samsung.com</owner>
+  <summary>
+    Recorded when the data associated with a persistent Web Notification gets
+    deleted. The value will be true if data deletion succeeded, and false if
+    there was an error.
+  </summary>
+</histogram>
+
+<histogram name="Notifications.PersistentWebNotificationClickResult"
+    enum="PlatformNotificationStatus">
+  <owner>peter@chromium.org</owner>
+  <owner>deepak.m1@samsumg.com</owner>
+  <summary>
+    Recorded delivery status for persistent notification clicks to a Service
+    Worker when handling a click on a persistent WebNotification has finished.
+  </summary>
+</histogram>
+
 <histogram name="NQE.FastestRTT" units="milliseconds">
   <owner>tbansal@chromium.org</owner>
   <summary>
@@ -36579,29 +36600,6 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
-<histogram
-    name="ServiceWorker.PlatformNotificationService.PersistentNotificationDataDeleted"
-    enum="BooleanSuccess">
-  <owner>peter@chromium.org</owner>
-  <owner>deepak.m1@samsung.com</owner>
-  <summary>
-    Recorded when the data associated with a persistent Web Notification gets
-    deleted. The value will be true if data deletion succeeded, and false if
-    there was an error.
-  </summary>
-</histogram>
-
-<histogram
-    name="ServiceWorker.PlatformNotificationService.PersistentWebNotificationClickResult"
-    enum="ServiceWorkerPlatformNotificationStatus">
-  <owner>peter@chromium.org</owner>
-  <owner>deepak.m1@samsumg.com</owner>
-  <summary>
-    Recorded delivery status for persistent notification clicks to a Service
-    Worker when handling a click on a persistent WebNotification has finished.
-  </summary>
-</histogram>
-
 <histogram name="ServiceWorker.PushEvent.Time" units="milliseconds">
   <owner>johnme@chromium.org</owner>
   <summary>
@@ -61308,6 +61306,14 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="16" label="I/O"/>
 </enum>
 
+<enum name="PlatformNotificationStatus" type="int">
+  <int value="0" label="OK"/>
+  <int value="1" label="Service Worker not found"/>
+  <int value="2" label="Service Worker error"/>
+  <int value="3" label="event.waitUntil promise rejected"/>
+  <int value="4" label="Database error"/>
+</enum>
+
 <enum name="PluginAvailabilityStatus" type="int">
   <int value="0" label="PLUGIN_NOT_REGISTERED"/>
   <int value="1" label="PLUGIN_AVAILABLE"/>
@@ -63775,14 +63781,6 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="2" label="Failed to delete ServiceWorkerDiskCache"/>
 </enum>
 
-<enum name="ServiceWorkerPlatformNotificationStatus" type="int">
-  <int value="0" label="OK"/>
-  <int value="1" label="Service Worker not found"/>
-  <int value="2" label="Service Worker error"/>
-  <int value="3" label="event.waitUntil promise rejected"/>
-  <int value="4" label="Database error"/>
-</enum>
-
 <enum name="ServiceWorkerReadResponseResult" type="int">
   <int value="0" label="OK"/>
   <int value="1" label="Read headers error"/>