Mac Overlays: Allow SolidColor and Tile quads to be candidates for overlays.

cc/output/overlay_candidate.h

Index: cc/output/overlay_candidate.h
diff --git a/cc/output/overlay_candidate.h b/cc/output/overlay_candidate.h
index f54a7ddf113c31dbdb5d026827f821528a4e1049..d45ca5e7a47083b929bd0baa4eb38f3e1d70e710 100644
--- a/cc/output/overlay_candidate.h
+++ b/cc/output/overlay_candidate.h
@@ -23,11 +23,15 @@ namespace cc {
 
 class DrawQuad;
 class IOSurfaceDrawQuad;
+class SolidColorDrawQuad;
 class StreamVideoDrawQuad;
 class TextureDrawQuad;
+class TileDrawQuad;
 
 class CC_EXPORT OverlayCandidate {
  public:
+  // Returns true if |quad|'s allow_overlay is true.
+  static bool IsAllowedQuad(const DrawQuad* quad);
   // Returns true and fills in |candidate| if |draw_quad| is of a known quad
   // type and contains an overlayable resource.
   static bool FromDrawQuad(const DrawQuad* quad, OverlayCandidate* candidate);
@@ -56,6 +60,8 @@ class CC_EXPORT OverlayCandidate {
   bool use_output_surface_for_resource;
   // Texture resource to present in an overlay.
   unsigned resource_id;
+  // If |resource_id| is 0, this overlay is solid color.
+  SkColor solid_color;
   // Stacking order of the overlay plane relative to the main surface,
   // which is 0. Signed to allow for "underlays".
   int plane_z_order;
@@ -71,6 +77,10 @@ class CC_EXPORT OverlayCandidate {
                                   OverlayCandidate* candidate);
   static bool FromIOSurfaceQuad(const IOSurfaceDrawQuad* quad,
                                 OverlayCandidate* candidate);
+  static bool FromTileQuad(const TileDrawQuad* quad,
+                           OverlayCandidate* candidate);
+  static bool FromSolidColorQuad(const SolidColorDrawQuad* quad,
+                                 OverlayCandidate* candidate);
 };
 
 typedef std::vector<OverlayCandidate> OverlayCandidateList;