Third-party iframe logging: Separate AboveAndLeft from Above

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 dae17a73801308a0a11862a349a1b416ae4e99f7..7e58f9df027d96c7536123b1f1203bb3f15ad84e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -27457,6 +27457,17 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Navigation.DeferredDocumentLoading.StatesV3"
+    enum="DocumentStateForDeferredLoadingV3">
+  <owner>dgrogan@chromium.org</owner>
+  <summary>
+    Why and if cross-origin documents would be loaded if we were to defer
+    loading as long as possible. Difference from V2: frames positioned both

[Ilya Sherman, 2016/10/27 20:51:21]

Please mark V2 as <obsolete>

[dgrogan, 2016/10/27 20:57:02]

Done.

+    above and to the left of the page have their own bucket and are no longer
+    counted in the "above" bucket.
+  </summary>
+</histogram>
+
 <histogram name="Navigation.EngagementTime.HTTP" units="ms">
   <owner>felt@chromium.org</owner>
   <summary>
@@ -78763,6 +78774,17 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="6" label="WouldLoadVisible"/>
 </enum>
 
+<enum name="DocumentStateForDeferredLoadingV3" type="int">
+  <int value="0" label="Created"/>
+  <int value="1" label="WouldLoadOutOfProcess"/>
+  <int value="2" label="WouldLoadDisplayNone"/>
+  <int value="3" label="WouldLoadZeroByZero"/>
+  <int value="4" label="WouldLoadAboveAndLeft"/>
+  <int value="5" label="WouldLoadAbove"/>
+  <int value="6" label="WouldLoadLeft"/>
+  <int value="7" label="WouldLoadVisible"/>
+</enum>
+
 <enum name="DocumentWriteGatedEvaluation" type="int">
   <int value="0" label="Script too long"/>
   <int value="1" label="No likely external script write"/>