stop using SkXfermode -- use SkBlendMode instead

cc/surfaces/surfaces_pixeltest.cc

 // Copyright 2014 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.
 
 #include "cc/output/compositor_frame.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/surface_draw_quad.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_aggregator.h"
@@ skipping 31 matching lines @@
 
 SharedQuadState* CreateAndAppendTestSharedQuadState(
     RenderPass* render_pass,
     const gfx::Transform& transform,
     const gfx::Size& size) {
   const gfx::Size layer_bounds = size;
   const gfx::Rect visible_layer_rect = gfx::Rect(size);
   const gfx::Rect clip_rect = gfx::Rect(size);
   bool is_clipped = false;
   float opacity = 1.f;
-  const SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
+  const SkBlendMode blend_mode = SkBlendMode::kSrcOver;
   SharedQuadState* shared_state = render_pass->CreateAndAppendSharedQuadState();
   shared_state->SetAll(transform, layer_bounds, visible_layer_rect, clip_rect,
                        is_clipped, opacity, blend_mode, 0);
   return shared_state;
 }
 
 // Draws a very simple frame with no surface references.
 TEST_F(SurfacesPixelTest, DrawSimpleFrame) {
   gfx::Rect rect(device_viewport_size_);
   RenderPassId id(1, 1);
@@ skipping 249 matching lines @@
 
   factory_.Destroy(root_local_frame_id);
   factory_.Destroy(left_child_local_id);
   factory_.Destroy(right_child_local_id);
 }
 
 }  // namespace
 }  // namespace cc
 
 #endif  // !defined(OS_ANDROID)