Plumb overlay processing into DirectRenderer.

cc/output/overlay_strategy_single_on_top.cc

Index: cc/output/overlay_strategy_single_on_top.cc
diff --git a/cc/output/overlay_strategy_single_on_top.cc b/cc/output/overlay_strategy_single_on_top.cc
index 4c2064196ddbca9181d192cd94d51b6c4603f3f9..a53644b255693d68bbf6244828ea73aee5dc97e9 100644
--- a/cc/output/overlay_strategy_single_on_top.cc
+++ b/cc/output/overlay_strategy_single_on_top.cc
@@ -37,7 +37,10 @@ bool OverlayStrategySingleOnTop::Attempt(
     return false;
 
   // Simple quads only.
-  if (!quad.quadTransform().IsIdentityOrTranslation() || quad.needs_blending ||
+  OverlayCandidate::OverlayTransform overlay_transform =
+      OverlayCandidate::GetOverlayTransform(quad.quadTransform(), quad.flipped);
+  if (overlay_transform == OverlayCandidate::INVALID ||
+      !quad.quadTransform().IsIdentityOrTranslation() || quad.needs_blending ||
       quad.shared_quad_state->opacity != 1.f ||
       quad.shared_quad_state->blend_mode != SkXfermode::kSrcOver_Mode ||
       quad.premultiplied_alpha || quad.background_color != SK_ColorTRANSPARENT)
@@ -52,11 +55,9 @@ bool OverlayStrategySingleOnTop::Attempt(
 
   // Add the overlay.
   OverlayCandidate candidate;
-  gfx::RectF float_rect(quad.rect);
-  quad.quadTransform().TransformRect(&float_rect);
-  candidate.transform =
-      quad.flipped ? OverlayCandidate::FLIP_VERTICAL : OverlayCandidate::NONE;
-  candidate.display_rect = gfx::ToNearestRect(float_rect);
+  candidate.transform = overlay_transform;
+  candidate.display_rect =
+      OverlayCandidate::GetOverlayRect(quad.quadTransform(), quad.rect);
   candidate.uv_rect = BoundingRect(quad.uv_top_left, quad.uv_bottom_right);
   candidate.format = RGBA_8888;
   candidates.push_back(candidate);