[WIP] Implement BackGroundFilter as seperate layer in cc

cc/layers/background_filter_layer_impl.h

Index: cc/layers/background_filter_layer_impl.h
diff --git a/cc/layers/background_filter_layer_impl.h b/cc/layers/background_filter_layer_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..b2b7dbf211bd41650ee7e2c5ebd0d41da460113d
--- /dev/null
+++ b/cc/layers/background_filter_layer_impl.h
@@ -0,0 +1,61 @@
+// 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_LAYERS_BACKGROUND_FILTER_LAYER_IMPL_H_
+#define CC_LAYERS_BACKGROUND_FILTER_LAYER_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/base/cc_export.h"
+#include "cc/layers/layer_impl.h"
+#include "ui/gfx/geometry/rect.h"
+
+using gfx::Rect;
+class FilterOperations;
+
+namespace cc {
+
+class CC_EXPORT BackgroundFilterLayerImpl : public LayerImpl {
+ public:
+  static scoped_ptr<BackgroundFilterLayerImpl> Create(LayerTreeImpl* tree_impl,
+                                                      int id) {
+    return make_scoped_ptr(new BackgroundFilterLayerImpl(tree_impl, id));
+  }
+  virtual ~BackgroundFilterLayerImpl();
+
+  // LayerImpl overrides.
+  virtual scoped_ptr<LayerImpl> CreateLayerImpl(
+      LayerTreeImpl* tree_impl) OVERRIDE;
+
+  virtual void AppendQuads(RenderPass* render_pass,
+                           const OcclusionTracker<LayerImpl>& occlusion_tracker,
+                           AppendQuadsData* append_quads_data) OVERRIDE;
+
+  void ApplyFilterAtRect(gfx::Rect src_filter_rect) {
+    src_filter_rect_ = src_filter_rect;
+  }
+
+  void DrawFilteredBackgroundAtRect(gfx::Rect draw_filter_rect) {
+    draw_filter_rect_ = draw_filter_rect;
+  }
+
+  void SetBackgroundFilters(const FilterOperations& filters) {
+    filter_operations_ = filters;
+  }
+
+ protected:
+  BackgroundFilterLayerImpl(LayerTreeImpl* tree_impl, int id);
+
+ private:
+  virtual const char* LayerTypeAsString() const OVERRIDE;
+
+  gfx::Rect src_filter_rect_;
+  gfx::Rect draw_filter_rect_;
+  FilterOperations filter_operations_;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundFilterLayerImpl);
+};
+
+}  // namespace cc
+
+#endif  // CC_LAYERS_BACKGROUND_FILTER_LAYER_IMPL_H_