Implemented event-dispatching for button clicks.

chrome/browser/chromeos/login/screens/eula_model.h

Index: chrome/browser/chromeos/login/screens/eula_model.h
diff --git a/chrome/browser/chromeos/login/screens/eula_model.h b/chrome/browser/chromeos/login/screens/eula_model.h
index 62089e3ff46eec1da4797c2be09656a37b971328..67f2fdd406bfa789d596c5a1e04689e934e7962e 100644
--- a/chrome/browser/chromeos/login/screens/eula_model.h
+++ b/chrome/browser/chromeos/login/screens/eula_model.h
@@ -16,6 +16,10 @@ class EulaView;
 // Allows us to get info from eula screen that we need.
 class EulaModel : public BaseScreen {
  public:
+  static const char kUserActionAcceptButtonClicked[];
+  static const char kUserActionBackButtonClicked[];
+  static const char kContextKeyUsageStatsEnabled[];
+
   explicit EulaModel(BaseScreenDelegate* base_screen_delegate);
   virtual ~EulaModel();
 
@@ -26,12 +30,6 @@ class EulaModel : public BaseScreen {
   // locale and manifest. Returns empty URL otherwise.
   virtual GURL GetOemEulaUrl() const = 0;
 
-  // Called when accept button was clicked.
-  virtual void OnAcceptButtonClicked() = 0;
-
-  // Called when back button was clicked.
-  virtual void OnBackButtonClicked() = 0;
-
   // Initiate TPM password fetch. Will call actor's OnPasswordFetched() when
   // done.
   virtual void InitiatePasswordFetch() = 0;