stop using SkXfermode -- use SkBlendMode instead

cc/test/surface_hittest_test_helpers.cc

Index: cc/test/surface_hittest_test_helpers.cc
diff --git a/cc/test/surface_hittest_test_helpers.cc b/cc/test/surface_hittest_test_helpers.cc
index e4e1fa15de189e5456a3e5928fb95fa4c5eaaed8..5fcea80d4c1078ac5583a80bc8cab26c75d22194 100644
--- a/cc/test/surface_hittest_test_helpers.cc
+++ b/cc/test/surface_hittest_test_helpers.cc
@@ -18,7 +18,7 @@ void CreateSharedQuadState(RenderPass* pass,
                            const gfx::Rect& root_rect) {
   SharedQuadState* child_shared_state = pass->CreateAndAppendSharedQuadState();
   child_shared_state->SetAll(transform, root_rect.size(), root_rect, root_rect,
-                             false, 1.0f, SkXfermode::kSrcOver_Mode, 0);
+                             false, 1.0f, SkBlendMode::kSrcOver, 0);
 }
 
 void CreateSolidColorDrawQuad(RenderPass* pass,