net: add DNS certificate revocation experiment.

chrome/browser/chrome_browser_main.h

Index: chrome/browser/chrome_browser_main.h
diff --git a/chrome/browser/chrome_browser_main.h b/chrome/browser/chrome_browser_main.h
index 321af78316d5e3d6bb0efbdae72a149f266de15e..d8abc36e00bafea9e6b2e81012770a9eb05eae59 100644
--- a/chrome/browser/chrome_browser_main.h
+++ b/chrome/browser/chrome_browser_main.h
@@ -125,6 +125,10 @@ class ChromeBrowserMainParts : public content::BrowserMainParts {
   // computer startup has on retention and usage of Chrome.
   void AutoLaunchChromeFieldTrial();
 
+  // A field trial to test the viability of a DNS based, certificate revocation
+  // system.
+  void ComodoDNSExperimentFieldTrial();
+
   // Methods for |SetupMetricsAndFieldTrials()| --------------------------------
 
   // Constructs metrics service and does related initialization, including