cc: Enable non-opaque harware overlays.

cc/output/overlay_unittest.cc

Index: cc/output/overlay_unittest.cc
diff --git a/cc/output/overlay_unittest.cc b/cc/output/overlay_unittest.cc
index a02bb2afeba41f7d76fa5df3974d8b1df3441e77..f270139f84cfac457cf35fc1b81a7b1fbf4f5fb8 100644
--- a/cc/output/overlay_unittest.cc
+++ b/cc/output/overlay_unittest.cc
@@ -835,13 +835,14 @@ TEST_F(SingleOverlayOnTopTest, MultipleRenderPasses) {
   EXPECT_EQ(1U, candidate_list.size());
 }
 
-TEST_F(SingleOverlayOnTopTest, RejectBlending) {
+TEST_F(SingleOverlayOnTopTest, AcceptBlending) {
   std::unique_ptr<RenderPass> pass = CreateRenderPass();
   TextureDrawQuad* quad =
       CreateFullscreenCandidateQuad(resource_provider_.get(),
                                     pass->shared_quad_state_list.back(),
                                     pass.get());
   quad->needs_blending = true;
+  quad->opaque_rect = gfx::Rect(0, 0, 0, 0);
 
   OverlayCandidateList candidate_list;
   RenderPassFilterList render_pass_filters;
@@ -850,7 +851,7 @@ TEST_F(SingleOverlayOnTopTest, RejectBlending) {
       resource_provider_.get(), pass.get(), render_pass_filters,
       render_pass_background_filters, &candidate_list, nullptr, nullptr,
       &damage_rect_, &content_bounds_);
-  EXPECT_EQ(0U, candidate_list.size());
+  EXPECT_EQ(1U, candidate_list.size());
 }
 
 TEST_F(SingleOverlayOnTopTest, RejectBackgroundColor) {