cc: Directly use property trees to calculate clip rect

cc/test/layer_tree_settings_for_testing.h

Index: cc/test/layer_tree_settings_for_testing.h
diff --git a/cc/test/layer_tree_settings_for_testing.h b/cc/test/layer_tree_settings_for_testing.h
new file mode 100644
index 0000000000000000000000000000000000000000..6f35b2f9bd072e5e475096b6963d6fbda02f626e
--- /dev/null
+++ b/cc/test/layer_tree_settings_for_testing.h
@@ -0,0 +1,20 @@
+// Copyright 2016 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.
+
+#ifndef CC_TEST_LAYER_TREE_SETTINGS_FOR_TESTING_H_
+#define CC_TEST_LAYER_TREE_SETTINGS_FOR_TESTING_H_
+
+#include "cc/trees/layer_tree_settings.h"
+
+namespace cc {
+
+class LayerTreeSettingsForTesting : public LayerTreeSettings {
+ public:
+  LayerTreeSettingsForTesting();
+  ~LayerTreeSettingsForTesting() override;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_LAYER_TREE_SETTINGS_FOR_TESTING_H_