[Android] Show document mode opt-out InfoBar on selected devices.

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 eb26ad8377e32229a37face662a2cad013c972b8..9ed9b90925e929c7d42191f765d7af7f75d49791 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -258,6 +258,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Android.DocumentModeOptOutInfoBar"
+    enum="AndroidDocumentModeOptOutInfoBarEvent">
+  <owner>kkimlabs@chromium.org</owner>
+  <summary>
+    Records UI events on document mode opt-out InfoBar on Android.
+  </summary>
+</histogram>
+
 <histogram name="Android.IsLastSharedAppInfoRetrieved"
     enum="BooleanIsLastSharedAppInfoRetrieved">
   <owner>jaekyun@chromium.org</owner>
@@ -54156,6 +54164,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1" label="NEON support"/>
 </enum>
 
+<enum name="AndroidDocumentModeOptOutInfoBarEvent" type="int">
+  <int value="0" label="Shown"/>
+  <int value="1" label="Accepted"/>
+  <int value="2" label="Denied"/>
+  <int value="3" label="Dismissed"/>
+</enum>
+
 <enum name="AndroidEvictionReason" type="int">
   <int value="0" label="TabUnusedTooLong"/>
   <int value="1" label="TabUnusedInSession"/>