Add Expect CT policy that gets checked on all certs

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 d1f6c589c98f2ed52d062650af328089eaa1f7c7..dcd707590aa7f2d82e1d1ba477d22d7c16cb2371 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -27776,6 +27776,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="Net.SSL_EVCertificateCTCompliance"
     enum="CTRequirementCompliance">
+  <obsolete>
+    Deprecated as of 01/2016.
+  </obsolete>
   <owner>eranm@chromium.org</owner>
   <owner>rsleevi@chromium.org</owner>
   <summary>
@@ -27801,6 +27804,20 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Net.SSL_EVCTCompliance" enum="EVCTCompliance">
+  <owner>eranm@chromium.org</owner>
+  <owner>rsleevi@chromium.org</owner>
+  <summary>
+    The state of compliance with Certificate Transparency presence requirements
+    for each EV certificate. An EV certificate could be non-compliant (in which
+    case it loses the EV status), comply through inclusion in the EV whitelist
+    or comply with the CT certificate policy. This metric will gauge adoption
+    rate of Certificate Transparency and will help identify when the EV
+    whitelist is no longer needed. Emitted during every SSL connection
+    establishment.
+  </summary>
+</histogram>
+
 <histogram name="Net.SSL_EVWhitelistValidityForNonCompliantCert"
     enum="EVWhitelistStatus">
   <owner>eranm@chromium.org</owner>
@@ -60783,6 +60800,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </enum>
 
 <enum name="CTRequirementCompliance" type="int">
+  <obsolete>
+    Deprecated 1/2016.
+  </obsolete>
   <int value="0" label="Not Compliant"/>
   <int value="1" label="Whitelisted"/>
   <int value="2" label="Has enough SCTs"/>
@@ -63278,6 +63298,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="3" label="NON_ERROR_PAGE_URL_AND_NO_ERROR_INFO"/>
 </enum>
 
+<enum name="EVCTCompliance" type="int">
+  <int value="0" label="EV policy does not apply"/>
+  <int value="1" label="Compliant because certificate is whitelisted"/>
+  <int value="2" label="Compliant because SCTs satisfy CT policy"/>
+  <int value="3" label="Not compliant because there are not enough SCTs"/>
+  <int value="4"
+      label="Not compliant because there are not diverse enough SCTs"/>
+  <int value="5" label="Not compliant because the build is not timely"/>
+</enum>
+
 <enum name="EventHitTest" type="int">
   <int value="0" label="Miss, not found in cache."/>
   <int value="1" label="Miss, explicitly avoided."/>