stop using SkXfermode -- use SkBlendMode instead

cc/ipc/shared_quad_state_struct_traits.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_IPC_SHARED_QUAD_STATE_STRUCT_TRAITS_H_
 #define CC_IPC_SHARED_QUAD_STATE_STRUCT_TRAITS_H_
 
 #include "cc/ipc/shared_quad_state.mojom-shared.h"
 #include "cc/quads/shared_quad_state.h"
 
@@ skipping 29 matching lines @@
 
   static bool is_clipped(const OptSharedQuadState& input) {
     return input.sqs->is_clipped;
   }
 
   static float opacity(const OptSharedQuadState& input) {
     return input.sqs->opacity;
   }
 
   static uint32_t blend_mode(const OptSharedQuadState& input) {
-    return input.sqs->blend_mode;
+    return static_cast<uint32_t>(input.sqs->blend_mode);
   }
 
   static int32_t sorting_context_id(const OptSharedQuadState& input) {
     return input.sqs->sorting_context_id;
   }
 };
 
 template <>
 struct StructTraits<cc::mojom::SharedQuadStateDataView, cc::SharedQuadState> {
   static const gfx::Transform& quad_to_target_transform(
@@ skipping 14 matching lines @@
     return sqs.clip_rect;
   }
 
   static bool is_clipped(const cc::SharedQuadState& sqs) {
     return sqs.is_clipped;
   }
 
   static float opacity(const cc::SharedQuadState& sqs) { return sqs.opacity; }
 
   static uint32_t blend_mode(const cc::SharedQuadState& sqs) {
-    return sqs.blend_mode;
+    return static_cast<uint32_t>(sqs.blend_mode);
   }
 
   static int32_t sorting_context_id(const cc::SharedQuadState& sqs) {
     return sqs.sorting_context_id;
   }
 
   static bool Read(cc::mojom::SharedQuadStateDataView data,
                    cc::SharedQuadState* out) {
     if (!data.ReadQuadToTargetTransform(&out->quad_to_target_transform) ||
         !data.ReadQuadLayerBounds(&out->quad_layer_bounds) ||
         !data.ReadVisibleQuadLayerRect(&out->visible_quad_layer_rect) ||
         !data.ReadClipRect(&out->clip_rect)) {
       return false;
     }
 
     out->is_clipped = data.is_clipped();
     out->opacity = data.opacity();
-    if (data.blend_mode() > SkXfermode::kLastMode)
+    if (data.blend_mode() > static_cast<int>(SkBlendMode::kLastMode))
       return false;
-    out->blend_mode = static_cast<SkXfermode::Mode>(data.blend_mode());
+    out->blend_mode = static_cast<SkBlendMode>(data.blend_mode());
     out->sorting_context_id = data.sorting_context_id();
     return true;
   }
 };
 
 }  // namespace mojo
 
 #endif  // CC_IPC_SHARED_QUAD_STATE_STRUCT_TRAITS_H_