mac: Add histograms to measure impact of Address Book integration.

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 edb97afe5758dd9832eb897b0f7751db9dd59c49..c7b155bce83ea053a5f73e5fe9695522744fb574 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -1993,6 +1993,64 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Autofill.MacAddressBook.AcceptedResultFromAddressBook"
+    enum="Boolean">

[Ilya Sherman, 2015/05/15 21:14:58]

Please use more customized labels, so that the dashboard viewer doesn't have to
figure out what "True" vs. "False" means.

[erikchen, 2015/05/15 21:37:23]

I think that that causes unnecessary duplication of information between the name
of the histogram and the label of the boolean but *shrug*, you're the owner.
Done.

+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    This metric is emitted each time the user accepts an Autofill suggestions.
+    It records whether the result is from the Address Book.
+  </summary>
+</histogram>
+
+<histogram name="Autofill.MacAddressBook.AccessTime" units="ms">
+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    The amount of time spent accessing the OSX Address Book the first time after
+    Chrome was launched. If this time is larger than ~100ms, this it is likely
+    that the user was shown a blocking, modal dialog.
+  </summary>
+</histogram>
+
+<histogram name="Autofill.MacAddressBook.ContainedMeCard" enum="Boolean">

[Ilya Sherman, 2015/05/15 21:14:58]

(Applies here and below, too.)

[erikchen, 2015/05/15 21:37:23]

Done.

+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    After a Chrome is given access to the Mac Address Book, whether the Address
+    Book contained a Me card.
+  </summary>
+</histogram>
+
+<histogram name="Autofill.MacAddressBook.MeCard.HadAddress" enum="Boolean">
+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    When Chrome is given access to the Me Card of the Address Book, whether the
+    card has an address.
+  </summary>
+</histogram>
+
+<histogram name="Autofill.MacAddressBook.MeCard.HadEmail" enum="Boolean">
+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    When Chrome is given access to the Me Card of the Address Book, whether the
+    card has an email.
+  </summary>
+</histogram>
+
+<histogram name="Autofill.MacAddressBook.MeCard.HadName" enum="Boolean">
+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    When Chrome is given access to the Me Card of the Address Book, whether the
+    card has a name.
+  </summary>
+</histogram>
+
+<histogram name="Autofill.MacAddressBook.MeCard.HadPhoneNumber" enum="Boolean">
+  <owner>erikchen@chromium.org</owner>
+  <summary>
+    When Chrome is given access to the Me Card of the Address Book, whether the
+    card has a phone number.
+  </summary>
+</histogram>
+
 <histogram name="Autofill.MacAddressBook.NumShowsBeforeSelected">
   <owner>erikchen@chromium.org</owner>
   <summary>