Added histograms on process singleton create when remote process exists and we cannot notify it

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index f76bc4b406106c0d885f372b8bc43eb1571a2dad..090c1a1b53f4acaf166d03076609dc32de5fc04c 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -29628,6 +29628,14 @@ from previous Chrome versions.
   <int value="1" label="Increment"/>
 </enum>
 
+<enum name="RemoteHungProcessTerminateReason" type="int">
+  <int value="0" label="Terminate accepted by user"/>
+  <int value="1" label="No visible windows found"/>
+  <int value="2" label="Retry attempts to notify remote process exceeded"/>
+  <int value="3" label="Failed to write message to socket"/>
+  <int value="4" label="Failed to read ACK message from socket"/>
+</enum>
+
 <enum name="RemotePlaybackDeviceType" type="int">
   <int value="0" label="Cast Generic Media Player"/>
   <int value="1" label="Cast YouTube Player"/>
@@ -29644,6 +29652,21 @@ from previous Chrome versions.
   <int value="6" label="Unknown media type"/>
 </enum>
 
+<enum name="RemoteProcessInteractionResult" type="int">
+  <int value="0" label="Terminate succeeded"/>
+  <int value="1" label="Terminate failed"/>
+  <int value="2" label="Terminate wait timeout"/>
+  <int value="3" label="Not enough permissions to terminate"/>
+  <int value="4" label="Remote process is shutting down"/>
+  <int value="5" label="User accepted profile unlock"/>
+  <int value="6" label="Remote process not found"/>
+  <int value="7" label="Failed to extract pid from lock file path"/>
+  <int value="8" label="Invalid lock file"/>
+  <int value="9" label="Orphaned lock file"/>
+  <int value="10" label="Same browser instance"/>
+  <int value="11" label="Failed to notify remote process"/>
+</enum>
+
 <enum name="RemotingStartTrigger" type="int">
   <int value="0" label="Unknown start trigger"/>
   <int value="1" label="Entered fullscreen"/>