Persist the server config that is received via kSCUP.

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 1959b7ce1bf2725085a5caedfc7a26d26097ce77..360d27c20d3f27063f07776519ec1abf0aaa472c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -16629,6 +16629,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Net.QuicVerifyProofFailed.HandshakeConfirmed"
+    enum="BooleanHandshakeConfirmed">
+  <owner>rtenneti@chromium.org</owner>
+  <summary>
+    Logged whenever proof verification fails and if the failure occurred before
+    or after the crypto handshake is confirmed.
+  </summary>
+</histogram>
+
 <histogram name="Net.RenegotiationExtensionSupported">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
@@ -38008,6 +38017,11 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="1" label="Had blank text"/>
 </enum>
 
+<enum name="BooleanHandshakeConfirmed" type="int">
+  <int value="0" label="Handshake not confirmed"/>
+  <int value="1" label="Handshake confirmed"/>
+</enum>
+
 <enum name="BooleanHasCrc" type="int">
   <int value="0" label="No CRC"/>
   <int value="1" label="Has CRC"/>