Obsolete two deleted memory metrics.

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 9feb3ec0d329b18716865e75508cb92ee9709ac2..f5a2a9a829eb3a9347941c2896ee3698a5a699fc 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -24759,6 +24759,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <owner>hajimehoshi@chromium.org</owner>
   <owner>kenjibaheux@google.com</owner>
   <owner>kouhei@chromium.org</owner>
+  <obsolete>
+    Deprecated 06/2016 Replaced with Memory.Browser.Large2.
+  </obsolete>
   <summary>
     The private working set used by the browser process.  Recorded once per UMA
     ping.  Note the existence of Memory.Browser.Large, which doesn't have
@@ -25132,6 +25135,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <owner>hajimehoshi@chromium.org</owner>
   <owner>kenjibaheux@google.com</owner>
   <owner>kouhei@chromium.org</owner>
+  <obsolete>
+    Deprecated 06/2016 Replaced with Memory.Renderer.Large2.
+  </obsolete>
   <summary>
     The private working set used by each renderer process.  Each renderer
     process provides one sample.  Recorded once per UMA ping. TODO(rkaplow):