WIP: Surface Synchronization System

cc/layers/surface_layer_impl.h

Index: cc/layers/surface_layer_impl.h
diff --git a/cc/layers/surface_layer_impl.h b/cc/layers/surface_layer_impl.h
index 22798cd7df88c0f0d81d13e37cf038a16742aade..f804dbf490d869980b7a9f5d6d3271499ddd02d9 100644
--- a/cc/layers/surface_layer_impl.h
+++ b/cc/layers/surface_layer_impl.h
@@ -11,6 +11,7 @@
 #include "base/memory/ptr_util.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer_impl.h"
+#include "cc/quads/surface_draw_quad.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_info.h"
 
@@ -24,8 +25,16 @@ class CC_EXPORT SurfaceLayerImpl : public LayerImpl {
   }
   ~SurfaceLayerImpl() override;
 
-  void SetSurfaceInfo(const SurfaceInfo& surface_info);
-  const SurfaceInfo& surface_info() const { return surface_info_; }
+  void SetPrimarySurfaceInfo(const SurfaceInfo& surface_info);
+  const SurfaceInfo& primary_surface_info() const {
+    return primary_surface_info_;
+  }
+
+  void SetFallbackSurfaceInfo(const SurfaceInfo& surface_info);
+  const SurfaceInfo& fallback_surface_info() const {
+    return fallback_surface_info_;
+  }
+
   void SetStretchContentToFillBounds(bool stretch_content);
 
   // LayerImpl overrides.
@@ -38,12 +47,20 @@ class CC_EXPORT SurfaceLayerImpl : public LayerImpl {
   SurfaceLayerImpl(LayerTreeImpl* tree_impl, int id);
 
  private:
+  void PopulateSurfaceDrawQuad(RenderPass* render_pass,
+                               SurfaceDrawQuad* surface_draw_quad,
+                               SurfaceDrawQuad* fallback_surface_draw_quad,
+                               SurfaceDrawQuadType surface_draw_quad_type,
+                               const SurfaceInfo& surface_info);
+
   void GetDebugBorderProperties(SkColor* color, float* width) const override;
   void AppendRainbowDebugBorder(RenderPass* render_pass);
   void AsValueInto(base::trace_event::TracedValue* dict) const override;
   const char* LayerTypeAsString() const override;
 
-  SurfaceInfo surface_info_;
+  SurfaceInfo primary_surface_info_;
+  SurfaceInfo fallback_surface_info_;
+
   bool stretch_content_to_fill_bounds_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceLayerImpl);