Update histograms.xml to match UseCounter.h.

BUG=348003

Review URL: https://codereview.chromium.org/189093007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255674 0039d316-1c4b-4281-b951-d872f2087c98

tools/metrics/histograms/histograms.xml

@@ -27989,6 +27989,7 @@ other types of suffix sets.
   <int value="282" label="HTMLMediaElementSeekToFragmentEnd"/>
   <int value="283" label="PrefixedWindowURL"/>
   <int value="284" label="PrefixedWorkerURL"/>
+  <int value="285" label="WindowOrientation"/>
 </enum>
 
 <enum name="FFmpegCodecs" type="int">