Remove BootControlInterface from FilesystemVerifierAction.

update_engine now only runs FilesystemVerifierAction after DownloadAction,
the partition paths are already set in InstallPlan, so we no longer need
BootControlInterface to get partition paths in FilesystemVerifierAction.

Test: ./update_engine_unittests
Test: applied an update in edison
Bug: 26972259

Change-Id: I9d439688a21e4e42be88a4c5accf731ce64d2d6f
diff --git a/update_attempter_unittest.cc b/update_attempter_unittest.cc
index d8b4318..eb8f16b 100644
--- a/update_attempter_unittest.cc
+++ b/update_attempter_unittest.cc
@@ -285,8 +285,7 @@
   EXPECT_EQ(ErrorCode::kOmahaResponseHandlerError,
             GetErrorCodeForAction(&omaha_response_handler_action,
                                   ErrorCode::kError));
-  FilesystemVerifierAction filesystem_verifier_action(
-      fake_system_state_.boot_control());
+  FilesystemVerifierAction filesystem_verifier_action;
   EXPECT_EQ(ErrorCode::kFilesystemVerifierError,
             GetErrorCodeForAction(&filesystem_verifier_action,
                                   ErrorCode::kError));