cros: Added a new function to quick unlock api for checking unfinished pins.

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 c38d839599ed3e0c43a57e9ee4192fcb9c4dedd7..039367bfc4251863fda0acd1e2ddee6c4bfc1107 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -79603,9 +79603,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
       label="Allow remote users to interact with elevated windows in remote
              assistance sessions"/>
   <int value="345" label="Enables HTTP/0.9 support on non-default ports"/>
-  <int value="346" label="Enables force sign in for browser."/>
-  <int value="347" label="Always open PDF in external viewer."/>
-  <int value="348" label="Force YouTube Restricted Mode"/>
+  <int value="346" label="Enables force sign in for Google Chrome."/>
+  <int value="347" label="Always Open PDF files externally"/>
+  <int value="348" label="Force minimum YouTube Restricted Mode"/>
+  <int value="349" label="Sets the minimum length of the lock screen pin."/>
+  <int value="350" label="Sets the maximum length of the lock screen pin."/>
+  <int value="351"
+      label="Enables users to set weak pins for the lock screen pin."/>
 </enum>
 
 <enum name="EnterprisePolicyInvalidations" type="int">
@@ -81587,6 +81591,7 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1146" label="LANGUAGESETTINGSPRIVATE_DISABLELANGUAGE"/>
   <int value="1147" label="FILEMANAGERPRIVATEINTERNAL_GETDIRECTORYSIZE"/>
   <int value="1148" label="BLUETOOTHLOWENERGY_SETADVERTISINGINTERVAL"/>
+  <int value="1149" label="QUICKUNLOCKPRIVATE_ISCREDENTIALUSABLE"/>
 </enum>
 
 <enum name="ExtensionIconState" type="int">