Add field trial and flag to mark HTTP as non-secure.

tools/metrics/actions/actions.xml

Index: tools/metrics/actions/actions.xml
diff --git a/tools/metrics/actions/actions.xml b/tools/metrics/actions/actions.xml
index ab2f7da5d308318039df41afddb2ea3b9d2b206f..322a845391306af4c9f35ebefadb5cb1341a4fde 100644
--- a/tools/metrics/actions/actions.xml
+++ b/tools/metrics/actions/actions.xml
@@ -182,6 +182,14 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="AboutFlags_mark-http-as-non-secure">
+  <owner>palmer@chromium.org, felt@chromium.org</owner>

[Mark P, 2015/01/02 19:14:28]

owner is a repeated field, one e-mail address per entry.

[palmer, 2015/01/07 00:59:00]

Done.

+  <description>
+    This flag lets users opt into or out of marking HTTP as Dubious or as

[Mark P, 2015/01/02 19:14:28]

 Actions need to clearly state when they are emitted.

More importantly, after a quick glance over your changelist, I don't see where
this action is emitted.  Did you forget to add the code?

[palmer, 2015/01/07 00:59:00]

I'm not sure what you mean. I think I am following the instructions in
chrome/browser/about_flags.cc, under "RECORDING USER METRICS FOR FLAGS".

[Mark P, 2015/01/07 22:43:58]

Ah, I didn't notice this was using that action recording system.

In that case, you need to revise your comment explain when this action is
emitted.  In this case, it's once per startup when the flag is active.

Also, why do you want this?  I believe it will get recorded if the user sets it
regardless of what value the user sets it to.  Is that useful for you?  You'll
know the usage of the flag but not what people are using it for...

+    Non-Secure.
+  </description>
+</action>
+
 <action name="AboutFlags_match-preview">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>