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 f9b9ebdebef0cf7a01fe6844262ce007491af345..82f7d5f29686ed4272eeb3d2cfcfbcc858bd8a34 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -9794,6 +9794,19 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Event.TouchSequence.HandlerType"
+    units="TouchSequenceHandlerType">
+  <owner>jdduke@chromium.org</owner>
+  <summary>
+    Indicates the type of handler associated with a given touch sequence. Each
+    touch sequence is assigned a single handler type depending on the state of
+    the registered touch handlers at the time the first touchstart for that
+    sequence is dispatched. If there are no touch handlers on a given document,
+    this is determined when the touchstart event is received in the browser,
+    otherwise it is determiend after the touchstart is ack'ed from the renderer.
+  </summary>
+</histogram>
+
 <histogram name="ExtensionActivity.AdInjected" units="Extension Count">
   <obsolete>
     Deprecated with M46.
@@ -72671,6 +72684,25 @@ To add a new entry, add it with any value and run test to compute valid value.
   </int>
 </enum>
 
+<enum name="TouchSequenceHandlerType" type="int">
+  <int value="0" label="Has touch handlers">
+    The touch sequence has both touchstart and touchmove handlers
+  </int>
+  <int value="1" label="Has touchstart handler but no touchmove handlers exist">
+    The touchstart has a handler but there are no registered touchmove handlers
+    on the page
+  </int>
+  <int value="2" label="No touch handlers exist">
+    There are no registered touchstart handlers on the page
+  </int>
+  <int value="3" label="No touch handler for sequence">
+    There is no registered touchstart handler for the current touch sequence
+  </int>
+  <int value="4" label="Unknown">
+    If a touch sequence timed out, the type of touch handler is indeterminate
+  </int>
+</enum>
+
 <enum name="TPMResultCodeEnum" type="int">
   <int value="0" label="TPM_SUCCESS"/>
   <int value="1" label="TPM_E_AUTHFAIL"/>