WIP: Surface Synchronization System

cc/ipc/quads_struct_traits.cc

Index: cc/ipc/quads_struct_traits.cc
diff --git a/cc/ipc/quads_struct_traits.cc b/cc/ipc/quads_struct_traits.cc
index 7695c12a8102080edd0784ac31aaa7c9b02cd74a..57fdd9415fda9f2ba3ae4e8bc103e52f80712343 100644
--- a/cc/ipc/quads_struct_traits.cc
+++ b/cc/ipc/quads_struct_traits.cc
@@ -102,11 +102,41 @@ bool StructTraits<cc::mojom::StreamVideoQuadStateDataView, cc::DrawQuad>::Read(
 }
 
 // static
+cc::mojom::SurfaceDrawQuadType
+EnumTraits<cc::mojom::SurfaceDrawQuadType, cc::SurfaceDrawQuadType>::ToMojom(
+    cc::SurfaceDrawQuadType surface_draw_quad_type) {
+  switch (surface_draw_quad_type) {
+    case cc::SurfaceDrawQuadType::PRIMARY:
+      return cc::mojom::SurfaceDrawQuadType::PRIMARY;
+    case cc::SurfaceDrawQuadType::FALLBACK:
+      return cc::mojom::SurfaceDrawQuadType::FALLBACK;
+  }
+}
+
+// static
+bool EnumTraits<cc::mojom::SurfaceDrawQuadType, cc::SurfaceDrawQuadType>::
+    FromMojom(cc::mojom::SurfaceDrawQuadType input,
+              cc::SurfaceDrawQuadType* out) {
+  switch (input) {
+    case cc::mojom::SurfaceDrawQuadType::PRIMARY:
+      *out = cc::SurfaceDrawQuadType::PRIMARY;
+      return true;
+    case cc::mojom::SurfaceDrawQuadType::FALLBACK:
+      *out = cc::SurfaceDrawQuadType::FALLBACK;
+      return true;
+  }
+  return false;
+}
+
+// static
 bool StructTraits<cc::mojom::SurfaceQuadStateDataView, cc::DrawQuad>::Read(
     cc::mojom::SurfaceQuadStateDataView data,
     cc::DrawQuad* out) {
   cc::SurfaceDrawQuad* quad = static_cast<cc::SurfaceDrawQuad*>(out);
-  return data.ReadSurface(&quad->surface_id);
+  // This wil be populated in RenderPass deserialization.
+  quad->fallback_quad = nullptr;
+  return data.ReadSurfaceDrawQuadType(&quad->surface_draw_quad_type) &&
+         data.ReadSurface(&quad->surface_id);
 }
 
 // static