Add more input metrics to Rappor

tools/metrics/rappor/rappor.xml

 <!--
 Copyright 2015 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <!--
 This file is used to generate a comprehensive list of Chrome rappor metrics
 along with a detailed description for each histogram. See the design doc at
 http://www.chromium.org/developers/design-documents/rappor
@@ skipping 892 matching lines @@
 </rappor-metric>
 
 <rappor-metric name="DomDistiller.PromptPanel" type="UMA_RAPPOR_TYPE">
   <owner>wychen@chromium.org</owner>
   <summary>
     The eTLD+1 of the frame URL where Reader Mode is prompted.
   </summary>
 </rappor-metric>
 
 <rappor-metric
-    name="Event.Latency.ScrollUpdate.Touch.TimeToScrollUpdateSwapBegin2"
+    name="Event.Latency.ScrollBegin.Touch.TimeToScrollUpdateSwapBegin2"
     type="UMA_RAPPOR_TYPE">
   <owner>nzolghadr@chromium.org</owner>
   <owner>tdresser@chromium.org</owner>
   <summary>
-    The eTLD+1 of the website visited, along with a the time between the initial
+    The eTLD+1 of the website visited, along with the time between initial
     creation of a touch event and the start of the frame swap on the GPU service
     caused by the generated ScrollUpdate gesture event if that ScrollUpdate is
     the first such event in a given scroll gesture event sequence. If no swap
     was induced by the event, no recording is made.
   </summary>
   <string-field name="Domain">
     <summary>
       The domain+registry of the URL.
     </summary>
   </string-field>
   <uint64-field name="Latency">
     <summary>
+      Latency in microseconds representing first
+      Touch.TimeToScrollUpdateSwapBegin.
+    </summary>
+  </uint64-field>
+</rappor-metric>
+
+<rappor-metric
+    name="Event.Latency.ScrollBegin.Wheel.TimeToScrollUpdateSwapBegin2"
+    type="UMA_RAPPOR_TYPE">
+  <owner>nzolghadr@chromium.org</owner>
+  <owner>tdresser@chromium.org</owner>
+  <summary>
+    The eTLD+1 of the website visited, along with  the time between initial
+    creation of a wheel event and the start of the frame swap on the GPU service
+    caused by the generated ScrollUpdate gesture event if that ScrollUpdate is
+    the first such event in a given scroll gesture event sequence. If no swap
+    was induced by the event, no recording is made.
+  </summary>
+  <string-field name="Domain">
+    <summary>
+      The domain+registry of the URL.
+    </summary>
+  </string-field>
+  <uint64-field name="Latency">
+    <summary>
+      Latency in microseconds representing first
+      Wheel.TimeToScrollUpdateSwapBegin.
+    </summary>
+  </uint64-field>
+</rappor-metric>
+
+<rappor-metric
+    name="Event.Latency.ScrollUpdate.Touch.TimeToScrollUpdateSwapBegin2"
+    type="UMA_RAPPOR_TYPE">
+  <owner>nzolghadr@chromium.org</owner>
+  <owner>tdresser@chromium.org</owner>
+  <summary>
+    The eTLD+1 of the website visited, along with the time between the initial
+    creation of a touch event and the start of the frame swap on the GPU service
+    caused by the generated ScrollUpdate gesture event. If no swap was induced
+    by the event, no recording is made.
+  </summary>
+  <string-field name="Domain">
+    <summary>
+      The domain+registry of the URL.
+    </summary>
+  </string-field>
+  <uint64-field name="Latency">
+    <summary>
       Latency in microseconds representing Touch.TimeToScrollUpdateSwapBegin.
     </summary>
   </uint64-field>
 </rappor-metric>
 
 <rappor-metric name="Extensions.AffectedByIsolateExtensions"
     type="UMA_RAPPOR_TYPE">
   <owner>nick@chromium.org</owner>
   <summary>
     The ID of an extension which will trigger out-of-process iframes under
@@ skipping 1372 matching lines @@
     <flag bit="1" label="IS_REPEAT_VISIT"/>
     <summary>
       Bitfield of the state from an SSL warning interstitial.
     </summary>
   </flags-field>
 </rappor-metric>
 
 </rappor-metrics>
 
 </rappor-configuration>