Deferred frame loading stats v2

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 2fbf786d0720efecba1eb895f1f01878170ba92b..3b7417bce43fa6ed5269b660129a87fa3a9d1797 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -26977,6 +26977,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="Navigation.DeferredDocumentLoading.StatesV1"
     enum="DocumentStateForDeferredLoading">
+  <obsolete>
+    Deprecated 10/2016 in favor of Navigation.DeferredDocumentLoading.StatesV2.
+  </obsolete>
   <owner>dgrogan@chromium.org</owner>
   <summary>
     Why and if cross-origin documents would be loaded in a world where we defer
@@ -26984,6 +26987,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Navigation.DeferredDocumentLoading.StatesV2"
+    enum="DocumentStateForDeferredLoadingV2">
+  <owner>dgrogan@chromium.org</owner>
+  <summary>
+    Why and if cross-origin documents would be loaded if we were to defer
+    loading as many as possible.

[dcheng, 2016/10/08 00:46:22]

many => long

[dgrogan, 2016/10/13 01:06:22]

Done.

+  </summary>
+</histogram>
+
 <histogram name="Navigation.EngagementTime.HTTP" units="ms">
   <owner>felt@chromium.org</owner>
   <summary>
@@ -77264,6 +77276,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1" label="WouldLoadBecauseVisible"/>
 </enum>
 
+<enum name="DocumentStateForDeferredLoadingV2" type="int">
+  <int value="0" label="Created"/>
+  <int value="1" label="WouldLoadDisplayNone"/>
+  <int value="2" label="WouldLoadOutOfProcess"/>
+  <int value="3" label="WouldLoadZeroByZero"/>
+  <int value="4" label="WouldLoadAbove"/>
+  <int value="5" label="WouldLoadLeft"/>
+  <int value="6" label="WouldLoadVisible"/>
+</enum>
+
 <enum name="DocumentWriteGatedEvaluation" type="int">
   <int value="0" label="Script too long"/>
   <int value="1" label="No likely external script write"/>