Create a mechanism for reporting rappor metrics from non-UMA

tools/metrics/rappor/rappor.xml

Index: tools/metrics/rappor/rappor.xml
diff --git a/tools/metrics/rappor/rappor.xml b/tools/metrics/rappor/rappor.xml
index 743f98a214a0c51248d6b518bc15732f30e20ad3..a647129db7a1cde9044451561928705e7476b726 100644
--- a/tools/metrics/rappor/rappor.xml
+++ b/tools/metrics/rappor/rappor.xml
@@ -15,6 +15,47 @@ TODO(holte): Add validation and pretty printing scripts.
 
 <rappor-configuration>
 
+<!--
+Parameters that rappor metrics can be collected with.  This list should be
+kept in sync with parameter type definitions in
+components/rappor/rappor_service.cc.

[Alexei Svitkine (slow), 2014/11/03 21:48:21]

Can you also file a bug that we should make a presubmit that checks the two are
the same?

[Steven Holte, 2014/11/04 02:44:20]

Done. https://code.google.com/p/chromium/issues/detail?id=429923

+-->
+
+<rappor-parameter-types>
+
+<rappor-parameters name="ETLD_PLUS_ONE">
+  <summary>
+    Parameters suitable for collecting the domain and registry of a URL from
+    UMA opt-in users.
+  </summary>
+  <parameters num-cohorts="128"
+              bytes="16"
+              hash-functions="2"
+              fake-prob=".5"
+              fake-one-prob=".5"
+              one-coin-prob=".75"
+              zero-coin-prob=".25"
+              always-enabled="false">
+  </parameters>
+</rappor-parameters>
+
+<rappor-parameters name="FULL_POPULATION">
+  <summary>
+    Parameters suitable for metrics collected from the full population of
+    chrome users.

[Alexei Svitkine (slow), 2014/11/03 21:48:21]

Nit: capitalize Chrome

[Steven Holte, 2014/11/04 02:44:20]

Changed this description.

+  </summary>
+  <parameters num-cohorts="128"
+              bytes="1"
+              hash-functions="2"
+              fake-prob=".5"
+              fake-one-prob=".5"
+              one-coin-prob=".75"
+              zero-coin-prob=".25"
+              always-enabled="true">
+</rappor-parameters>
+
+</rappor-parameter-types>
+
 <!-- Rappor metric definitions -->
 
 <rappor-metrics>