Browsertests for improved reset options: powerwash and rollback.

chromeos/dbus/fake_update_engine_client.h

Index: chromeos/dbus/fake_update_engine_client.h
diff --git a/chromeos/dbus/fake_update_engine_client.h b/chromeos/dbus/fake_update_engine_client.h
index 8768e31c360c14572a598e6d522687802246b34d..146db8b6c8d9e95aa93b94352906cdf7171f2146 100644
--- a/chromeos/dbus/fake_update_engine_client.h
+++ b/chromeos/dbus/fake_update_engine_client.h
@@ -52,16 +52,29 @@ class FakeUpdateEngineClient : public UpdateEngineClient {
   void set_update_check_result(
       const UpdateEngineClient::UpdateCheckResult& result);
 
+  void set_can_rollback_check_result(bool result) {
+      can_rollback_stub_result_ = result;
+  }
+
   // Returns how many times RebootAfterUpdate() is called.
-  int reboot_after_update_call_count() {
-    return reboot_after_update_call_count_;
+  int reboot_after_update_call_count() const {
+      return reboot_after_update_call_count_;
   }
 
+  // Returns how many times Rollback() is called.
+  int rollback_call_count() const { return rollback_call_count_; }
+
+  // Returns how many times Rollback() is called.
+  int can_rollback_call_count() const { return can_rollback_call_count_; }
+
  private:
   std::queue<UpdateEngineClient::Status> status_queue_;
   UpdateEngineClient::Status default_status_;
   UpdateEngineClient::UpdateCheckResult update_check_result_;
+  bool can_rollback_stub_result_;
   int reboot_after_update_call_count_;
+  int rollback_call_count_;
+  int can_rollback_call_count_;
 };
 
 }  // namespace chromeos