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 6ece86b5abbd2198a29959788a6e79b3f819f72f..c9cb971a86cd2e3e261eb6bfe27789b775191b69 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -19673,6 +19673,12 @@ other types of suffix sets.
   <summary>Counts number of calls to WebRTC APIs from JavaScript.</summary>
 </histogram>
 
+<histogram name="Webstore.ExtensionInstallResult">

[motek., 2013/11/12 16:41:57]

The result is either 'successful or not', right? If so, you should declare
histogram's enum tag as either BooleanSuccess or simply Boolean. This will make
results easier to interpret.

[jackhou1, 2013/11/12 23:39:08]

Done.

+  <summary>
+    The success or failure of extension installs from the webstore.
+  </summary>
+</histogram>
+
 <histogram name="Win8.PageLoad" enum="Win8PageLoadType">
   <summary>
     Count of page loads in each of the 2 different environments (metro/desktop)
@@ -30730,6 +30736,11 @@ other types of suffix sets.
   <affected-histogram name="Startup.BrowserOpenTabs"/>
 </fieldtrial>
 
+<fieldtrial name="WebstoreDownloadDirectory">
+  <group name="SeparateDirectoryUnderUDD"/>

[motek., 2013/11/12 16:41:57]

It seems that for your purpose this block is not necessary. You will be able to
declare your field trial server-side. Please remove unless you think you need
suffixed version of histograms for some reason.

[jackhou1, 2013/11/12 23:39:08]

If I remove this block, will I be able to see the results of
Webstore.ExtensionInstallResult separately (i.e. with and without the field
trial)?

[jackhou1, 2013/11/13 00:27:50]

Done.

+  <affected-histogram name="Webstore.ExtensionInstallResult"/>
+</fieldtrial>
+
 <fieldtrial name="WebStoreLinkExperiment">
   <group name="Disabled" label="Neither extra webstore link is visible"/>
   <group name="FooterLink" label="Link in bottom right of footer"/>