Add DCLayerOverlayProcessor and supporting DCLayer structures.

cc/output/overlay_processor.h

Index: cc/output/overlay_processor.h
diff --git a/cc/output/overlay_processor.h b/cc/output/overlay_processor.h
index 99190da20ef53b66bf5daf4a6270fc55c315a0a3..4b1686f2f34eee201193a5a0a30074fcec917ee3 100644
--- a/cc/output/overlay_processor.h
+++ b/cc/output/overlay_processor.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/ca_layer_overlay.h"
+#include "cc/output/dc_layer_overlay.h"
 #include "cc/output/overlay_candidate.h"
 #include "cc/quads/render_pass.h"
 
@@ -49,6 +50,7 @@ class CC_EXPORT OverlayProcessor {
       const RenderPassFilterList& render_pass_background_filters,
       OverlayCandidateList* overlay_candidates,
       CALayerOverlayList* ca_layer_overlays,
+      DCLayerOverlayList* dc_layer_overlays,
       gfx::Rect* damage_rect,
       std::vector<gfx::Rect>* content_bounds);
 
@@ -67,10 +69,20 @@ class CC_EXPORT OverlayProcessor {
       OverlayCandidateList* overlay_candidates,
       CALayerOverlayList* ca_layer_overlays,
       gfx::Rect* damage_rect);
+  bool ProcessForDCLayers(
+      ResourceProvider* resource_provider,
+      RenderPass* render_pass,
+      const RenderPassFilterList& render_pass_filters,
+      const RenderPassFilterList& render_pass_background_filters,
+      OverlayCandidateList* overlay_candidates,
+      DCLayerOverlayList* dc_layer_overlays,
+      gfx::Rect* damage_rect);
   // Update |damage_rect| by removing damage casued by |candidates|.
   void UpdateDamageRect(OverlayCandidateList* candidates,
                         gfx::Rect* damage_rect);
 
+  DCLayerOverlayProcessor dc_processor_;
+
   DISALLOW_COPY_AND_ASSIGN(OverlayProcessor);
 };