cc: Clean up OcclusionTracker template parameters.

cc/test/test_occlusion_tracker.h

Index: cc/test/test_occlusion_tracker.h
diff --git a/cc/test/test_occlusion_tracker.h b/cc/test/test_occlusion_tracker.h
new file mode 100644
index 0000000000000000000000000000000000000000..cdb8de088a3e0a648d9fbd409f14863b224b8466
--- /dev/null
+++ b/cc/test/test_occlusion_tracker.h
@@ -0,0 +1,44 @@
+// Copyright 2012 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_TEST_OCCLUSION_TRACKER_H_
+#define CC_TEST_TEST_OCCLUSION_TRACKER_H_
+
+#include "cc/layers/render_surface.h"
+#include "cc/layers/render_surface_impl.h"
+#include "cc/trees/occlusion_tracker.h"
+
+namespace cc {
+
+// A subclass to expose the total current occlusion.
+template <typename LayerType>
+class TestOcclusionTracker : public OcclusionTracker<LayerType> {
+ public:
+  TestOcclusionTracker(const gfx::Rect& screen_scissor_rect,
+                       bool record_metrics_for_frame)
+      : OcclusionTracker<LayerType>(screen_scissor_rect,
+                                    record_metrics_for_frame) {}
+
+  Region occlusion_from_inside_target() const {
+    return OcclusionTracker<LayerType>::stack_.back()
+        .occlusion_from_inside_target;
+  }
+  Region occlusion_from_outside_target() const {
+    return OcclusionTracker<LayerType>::stack_.back()
+        .occlusion_from_outside_target;
+  }
+
+  void set_occlusion_from_outside_target(const Region& region) {
+    OcclusionTracker<LayerType>::stack_.back().occlusion_from_outside_target =
+        region;
+  }
+  void set_occlusion_from_inside_target(const Region& region) {
+    OcclusionTracker<LayerType>::stack_.back().occlusion_from_inside_target =
+        region;
+  }
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_TEST_OCCLUSION_TRACKER_H_