cc: Add finch feature flag for checker-imaging.

cc/base/features.cc

Index: cc/base/features.cc
diff --git a/cc/base/features.cc b/cc/base/features.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a7f0efee13b41357496b9a7a96f6d547d6265da4
--- /dev/null
+++ b/cc/base/features.cc
@@ -0,0 +1,14 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/base/features.h"
+
+namespace cc {
+namespace features {
+
+const base::Feature kEnableCheckerImaging{"EnableCheckerImaging",
+                                          base::FEATURE_DISABLED_BY_DEFAULT};
+
+}  // namespace features
+}  // namespace cc