New Profile metric for Auth Errors.

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 495f4bc3b1b3ba212d727e520e1f8e9a998fb126..2aba64494d049085bc6da80d991bc350a0aa8612 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -27753,6 +27753,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Profile.NumberOfProfilesWithAuthErrors">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    Counts the type GAIA authentication errors on a user's machine when Chrome
+    starts up. The types of errors are broken down in Signin.AuthError.
+  </summary>
+</histogram>
+
 <histogram name="Profile.NumberOfSignedInProfiles">
   <owner>bcwhite@chromium.org</owner>
   <owner>rlp@chromium.org</owner>
@@ -32663,6 +32671,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>Track how a user interfacts with the android signin promo.</summary>
 </histogram>
 
+<histogram name="Signin.AuthError" enum="GoogleServiceAuthError">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    Log the type of GAIA authentication error that occur whenever the error
+    state changes.
+  </summary>
+</histogram>
+
 <histogram name="Signin.DuringFirstRun">
   <owner>mlerman@chromium.org</owner>
   <summary>