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

content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.mm

Index: content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.mm
diff --git a/content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.mm b/content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.mm
index 72317d6c3092e66199adf1f5f34a8ec1d686f6d1..234f12bd0aa3dea70b7b8c9e7a1993c46271167e 100644
--- a/content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.mm
+++ b/content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.mm
@@ -5,6 +5,7 @@
 #include "content/browser/compositor/browser_compositor_overlay_candidate_validator_mac.h"
 
 #include "cc/output/overlay_strategy_sandwich.h"
+#include "cc/quads/texture_draw_quad.h"
 
 namespace content {
 
@@ -24,6 +25,21 @@ void BrowserCompositorOverlayCandidateValidatorMac::GetStrategies(
   strategies->push_back(make_scoped_ptr(new cc::OverlayStrategySandwich(this)));
 }
 
+bool BrowserCompositorOverlayCandidateValidatorMac::IsSupportedQuad(
+    const cc::DrawQuad* quad) {
+  switch (quad->material) {
+    case cc::DrawQuad::IO_SURFACE_CONTENT:
+    case cc::DrawQuad::SOLID_COLOR:
+    case cc::DrawQuad::TILED_CONTENT:
+      return true;
+    case cc::DrawQuad::TEXTURE_CONTENT:
+      return cc::TextureDrawQuad::MaterialCast(quad)->premultiplied_alpha;
+    default:
+      break;
+  }
+  return false;
+}
+
 void BrowserCompositorOverlayCandidateValidatorMac::CheckOverlaySupport(
     cc::OverlayCandidateList* surfaces) {
   // SW mirroring copies out of the framebuffer, so we can't remove any