stop using SkXfermode -- use SkBlendMode instead

cc/blink/web_display_item_list_impl.h

Index: cc/blink/web_display_item_list_impl.h
diff --git a/cc/blink/web_display_item_list_impl.h b/cc/blink/web_display_item_list_impl.h
index 7a8e9ef7b88bfb7dd2a7a921c366a78fcc06d5ad..3e51423025c5be74d3a5f9f8f1cc58716511a6db 100644
--- a/cc/blink/web_display_item_list_impl.h
+++ b/cc/blink/web_display_item_list_impl.h
@@ -11,8 +11,8 @@
 #include "cc/playback/display_item_list.h"
 #include "third_party/WebKit/public/platform/WebDisplayItemList.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
+#include "third_party/skia/include/core/SkBlendMode.h"
 #include "third_party/skia/include/core/SkRegion.h"
-#include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/geometry/point_f.h"
 
 class SkColorFilter;
@@ -58,7 +58,7 @@ class WebDisplayItemListImpl : public blink::WebDisplayItemList {
   void appendTransformItem(const SkMatrix44& matrix) override;
   void appendEndTransformItem() override;
   void appendCompositingItem(float opacity,
-                             SkXfermode::Mode,
+                             SkBlendMode,
                              SkRect* bounds,
                              SkColorFilter*) override;
   void appendEndCompositingItem() override;