stop using SkXfermode -- use SkBlendMode instead

cc/layers/solid_color_layer_impl_unittest.cc

Index: cc/layers/solid_color_layer_impl_unittest.cc
diff --git a/cc/layers/solid_color_layer_impl_unittest.cc b/cc/layers/solid_color_layer_impl_unittest.cc
index 312449b2d882b483b292db23460a479d2cbb463f..d2e2bb86dac9c30a47fa5bccd4fec018da37f473 100644
--- a/cc/layers/solid_color_layer_impl_unittest.cc
+++ b/cc/layers/solid_color_layer_impl_unittest.cc
@@ -101,7 +101,7 @@ TEST(SolidColorLayerImplTest, VerifyCorrectOpacityInQuad) {
 }
 
 TEST(SolidColorLayerImplTest, VerifyCorrectBlendModeInQuad) {
-  const SkXfermode::Mode blend_mode = SkXfermode::kMultiply_Mode;
+  const SkBlendMode blend_mode = SkBlendMode::kMultiply;
 
   std::unique_ptr<RenderPass> render_pass = RenderPass::Create();