Upstream FirstRunActivity and friends.

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 477ad058849b3f1a0caa0bdd1ed7a5a9ddbe5bb0..2b7067f047ea681f5906a79261e49cf1f773c7e1 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -14680,6 +14680,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="MobileFre.SignInChoice" enum="MobileFreSignInChoice">

[Ilya Sherman, 2015/03/11 19:20:20]

FWIW, I find "Fre" to be a very non-obvious acronym.  I'd much prefer to see
"FirstRunExperience".

[aurimas (slooooooooow), 2015/03/11 19:22:10]

Sadly, this is used for several releases already and defined in internal version
of histograms.xml so I cannot rename it :'(

+  <owner>aruslan@chromium.org</owner>
+  <summary>
+    Android: How the user left the sign-in part of the &quot;first run
+    experience&quot; activity (M-38+).
+  </summary>
+</histogram>
+
 <histogram name="MobileFullscreenVideo.DurationAfterPotraitRotation"
     units="milliseconds">
   <owner>qinmin@chromium.org</owner>
@@ -53791,6 +53799,19 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="1" label="Failure"/>
 </enum>
 
+<enum name="MobileFreSignInChoice" type="int">
+  <summary>
+    These values are defined inside the MobileFreSignInChoice enum
+    chrome/browser/android/metrics/uma_bridge.cc and reference possible ways of
+    completing the sign-in part of the First Run Experience.
+  </summary>
+  <int value="0" label="Accept default account"/>
+  <int value="1" label="Accept another account"/>
+  <int value="2" label="Settings default account"/>
+  <int value="3" label="Settings another account"/>
+  <int value="4" label="No thanks"/>
+</enum>
+
 <enum name="MobileSessionCallerApp" type="int">
   <int value="0" label="Google Search"/>
   <int value="1" label="GMail"/>