cc: Trigger GPU rasterization based on a per-layer hint

cc/test/hybrid_rasterization_settings.h

+// Copyright 2014 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_HYBRID_RASTERIZATION_SETTINGS_H_
+#define CC_TEST_HYBRID_RASTERIZATION_SETTINGS_H_
+
+#include "cc/trees/layer_tree_settings.h"
+
+namespace cc {
+
+class HybridRasterizationSettings : public LayerTreeSettings {
+ public:
+  HybridRasterizationSettings() {
+    impl_side_painting = true;
+    rasterization_site = HybridRasterization;
+  }
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_HYBRID_RASTERIZATION_SETTINGS_H_