Fix recording of "Time to error histograms".

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 746f5abba33d213075bffbb7728c377dc27a8613..5d9d6220f68af67f6ab1efff24a7aeabfc3594b3 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -22638,6 +22638,17 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="Net.RequestTime">
   <owner>rdsmith@chromium.org</owner>
+  <obsolete>
+    Revving version due to failure in original implementation.

[Alexei Svitkine (slow), 2015/07/08 19:16:23]

Nit: Mention the name of the other histogram explicitly.

[Randy Smith (Not in Mondays), 2015/07/08 19:20:34]

Done.

+  </obsolete>
+  <summary>
+    The amount of time between request initiation and request completion for
+    success and various different errors.
+  </summary>
+</histogram>
+
+<histogram name="Net.RequestTime2">
+  <owner>rdsmith@chromium.org</owner>
   <summary>
     The amount of time between request initiation and request completion for
     success and various different errors.
@@ -72825,6 +72836,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <suffix name="MiscError" label="Uncategorized error"/>
   <suffix name="Success" label="Success"/>
   <affected-histogram name="Net.RequestTime"/>
+  <affected-histogram name="Net.RequestTime2"/>
 </histogram_suffixes>
 
 <histogram_suffixes name="NetworkErrors" separator=".">