Replace 2 histograms with Variations.SeedFetchResponseOrErrorCode.

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 785ef1d286628219bbea4a07beb00865a717983c..da7fd32ef53a85d1951cef34f76ebdfea390a9f3 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -65359,6 +65359,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Variations.FailedRequestErrorCode" enum="NetErrorCodes">
+  <obsolete>
+    Deprecated 10/2016. Replaced by Variations.SeedFetchResponseOrErrorCode.
+  </obsolete>
   <owner>asvitkine@chromium.org</owner>
   <summary>
     The counts of network error codes encountered by VariationsService when an
@@ -65542,6 +65545,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Variations.SeedFetchResponseCode" enum="HttpResponseCode">
+  <obsolete>
+    Deprecated 10/2016. Replaced by Variations.SeedFetchResponseOrErrorCode.
+  </obsolete>
   <owner>asvitkine@chromium.org</owner>
   <summary>
     The counts of HTTP response codes encountered by VariationsService when
@@ -65549,6 +65555,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Variations.SeedFetchResponseOrErrorCode"
+    enum="CombinedHttpResponseAndNetErrorCode">
+  <owner>asvitkine@chromium.org</owner>
+  <summary>
+    HTTP response codes and network error encountered by VariationsService when
+    attempting to fetch a variations seed from the server.
+  </summary>
+</histogram>
+
 <histogram name="Variations.SeedFreshness" units="minutes">
   <owner>asvitkine@chromium.org</owner>
   <summary>