Mark WebFont.Resource.* histograms as obsolete

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 8cb500a42caa6c8a7322b6ec7c4d12c85cb270e6..6c650819ae6306732b2c5f1a824dd2c1beaf19be 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -34635,6 +34635,9 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="WebFont.Resource.StyleRecalcToDownloadLatency"
     units="milliseconds">
+  <obsolete>
+    Deprecated 11/2013. No longer tracked.
+  </obsolete>
   <owner>kenjibaheux@chromium.org</owner>
   <owner>ksakamoto@chromium.org</owner>
   <summary>
@@ -34646,6 +34649,9 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="WebFont.Resource.UsageType" enum="WebFontUsageType">
+  <obsolete>
+    Deprecated 11/2013. No longer tracked.
+  </obsolete>
   <owner>kenjibaheux@chromium.org</owner>
   <owner>ksakamoto@chromium.org</owner>
   <summary>