stop using SkXfermode -- use SkBlendMode instead

cc/playback/compositing_display_item.cc

Index: cc/playback/compositing_display_item.cc
diff --git a/cc/playback/compositing_display_item.cc b/cc/playback/compositing_display_item.cc
index 125526a10abf483183395fd4992981ab71cc4e3d..e3d3c9bcbfb52df91143d68cc85c4f7efd256443 100644
--- a/cc/playback/compositing_display_item.cc
+++ b/cc/playback/compositing_display_item.cc
@@ -17,14 +17,14 @@
 #include "third_party/skia/include/core/SkFlattenable.h"
 #include "third_party/skia/include/core/SkFlattenableSerialization.h"
 #include "third_party/skia/include/core/SkPaint.h"
-#include "third_party/skia/include/core/SkXfermode.h"
+
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
 CompositingDisplayItem::CompositingDisplayItem(
     uint8_t alpha,
-    SkXfermode::Mode xfermode,
+    SkBlendMode xfermode,
     SkRect* bounds,
     sk_sp<SkColorFilter> cf,
     bool lcd_text_requires_opaque_layer) {
@@ -38,7 +38,7 @@ CompositingDisplayItem::CompositingDisplayItem(
 
   const proto::CompositingDisplayItem& details = proto.compositing_item();
   uint8_t alpha = static_cast<uint8_t>(details.alpha());
-  SkXfermode::Mode xfermode = SkXfermodeModeFromProto(details.mode());
+  SkBlendMode xfermode = SkXfermodeModeFromProto(details.mode());
   std::unique_ptr<SkRect> bounds;
   if (details.has_bounds()) {
     bounds.reset(
@@ -64,7 +64,7 @@ CompositingDisplayItem::~CompositingDisplayItem() {
 }
 
 void CompositingDisplayItem::SetNew(uint8_t alpha,
-                                    SkXfermode::Mode xfermode,
+                                    SkBlendMode xfermode,
                                     SkRect* bounds,
                                     sk_sp<SkColorFilter> cf,
                                     bool lcd_text_requires_opaque_layer) {