Can now adjust the number of retries before the blacklist is disabled.

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 4a8a881c9070559e424cddffca7db974cb476c50..23fb26131795d63b40d6e21b51fa882a0e32b6b8 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -1765,12 +1765,21 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Blacklist.RetryAttempts.Success">
+  <owner>csharp@chromium.org</owner>
+  <owner>krstnmnlsn@chromium.org</owner>
+  <summary>
+    Records the number of attempts needed before the blacklist is properly set
+    up.  This is logged immediately after a successful setup.

[robertshield, 2014/06/16 13:56:54]

nit: 1-space after a period, or keep it at 2 if you are of that type. Either or
be consistent with the change in BlacklistSetup just below.

[krstnmnlsn, 2014/06/16 17:37:43]

Done.

+  </summary>
+</histogram>
+
 <histogram name="Blacklist.Setup" enum="BlacklistSetup">
   <owner>csharp@chromium.org</owner>
   <summary>
     Records the successes and failures when running the browser blacklist setup
     code. Used to determine if the blacklist is working as intended during
-    startup(since the blacklist runs before crash reporting is set up).  This
+    startup (since the blacklist runs before crash reporting is set up). This
     only occurs on Windows.
   </summary>
 </histogram>
@@ -33138,6 +33147,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="2" label="Blacklist failed."/>
   <int value="3" label="Blacklist thunk setup failed."/>
   <int value="4" label="Blacklist interception failed."/>
+  <int value="5" label="Blacklist disabled."/>
 </enum>
 
 <enum name="BluetoothPairingMethod" type="int">