Update CPAT protocol to send lite-page transform acceptance with ect

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 bfb4c9f8318b409301e8d416f3cbe24f677ed5d7..c94d6e40c906e140894ee24814d887e81aaba5bc 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -9750,6 +9750,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="DataReductionProxy.AutoLoFiRequestHeaderState"
     enum="DataReductionProxyAutoLoFiRequestHeaderState">
+  <obsolete>
+    Deprecated as of 4/2017. No longer conditionally send header based on
+    effective connection type.
+  </obsolete>
   <owner>tbansal@chromium.org</owner>
   <summary>
     Counts the changes in the state of Lo-Fi request header (q=low) being added
@@ -10139,6 +10143,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="DataReductionProxy.LoFi.Accuracy"
     enum="DataReductionProxyAutoLoFiAccuracy">
+  <obsolete>
+    Deprecated as of 4/2017. No longer have &quot;auto-lofi&quot; nor its
+    accuracy on client based on effective connection type.
+  </obsolete>
   <owner>bengr@chromium.org</owner>
   <owner>tbansal@chromium.org</owner>
   <summary>
@@ -89132,6 +89140,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </enum>
 
 <enum name="DataReductionProxyAutoLoFiAccuracy" type="int">
+  <obsolete>
+    Deprecated as of 4/2017. No longer have &quot;auto-lofi&quot; nor its
+    accuracy on client based on effective connection type.
+  </obsolete>
   <int value="0"
       label="Estimated network quality as slow and was actually slow"/>
   <int value="1"
@@ -89143,6 +89155,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </enum>
 
 <enum name="DataReductionProxyAutoLoFiRequestHeaderState" type="int">
+  <obsolete>
+    Deprecated as of 4/2017. No longer conditionally send header based on
+    effective connection type.
+  </obsolete>
   <int value="0" label="Empty to Empty"/>
   <int value="1" label="Empty to Low"/>
   <int value="2" label="Low to Empty"/>