[Autofill] Guard against the initialization failure of ICU Collator.

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 4132996a123981b68b3d1702cf59dd2010eaff41..ffe39af768274fe004a8f00995f6b731a259063e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -2221,6 +2221,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>The autofill state related to a submitted form.</summary>
 </histogram>
 
+<histogram name="Autofill.IcuCollatorCreationSuccess" enum="BooleanSuccess">

[Ilya Sherman, 2015/11/19 22:31:54]

Optional nit: A BooleanCreated with labels "Failed" and "Created" might be a
little clearer.

[Mathieu, 2015/11/20 16:19:38]

I find it would be slightly redundant because there is "Creation" in the
histogram name. Creation success and Creation failure is straightforward to me.

+  <owner>mathp@chromium.org</owner>
+  <summary>
+    Tracks whether Autofill was able to create the ICU collator successfully.
+  </summary>
+</histogram>
+
 <histogram name="Autofill.IsEnabled.PageLoad" enum="BooleanEnabled">
   <owner>isherman@chromium.org</owner>
   <summary>