stop using SkXfermode -- use SkBlendMode instead

cc/output/renderer_pixeltest.cc

Index: cc/output/renderer_pixeltest.cc
diff --git a/cc/output/renderer_pixeltest.cc b/cc/output/renderer_pixeltest.cc
index c799d62a8cf092ecf4e9b9dc11b5ad25cd8e47cf..ffd204a9be180a56ad2ea8bdebc8a2d2bca96e0c 100644
--- a/cc/output/renderer_pixeltest.cc
+++ b/cc/output/renderer_pixeltest.cc
@@ -63,7 +63,7 @@ SharedQuadState* CreateTestSharedQuadState(
   const gfx::Rect clip_rect = rect;
   const bool is_clipped = false;
   const float opacity = 1.0f;
-  const SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
+  const SkBlendMode blend_mode = SkBlendMode::kSrcOver;
   int sorting_context_id = 0;
   SharedQuadState* shared_state = render_pass->CreateAndAppendSharedQuadState();
   shared_state->SetAll(quad_to_target_transform, layer_bounds,
@@ -81,7 +81,7 @@ SharedQuadState* CreateTestSharedQuadStateClipped(
   const gfx::Rect visible_layer_rect = clip_rect;
   const bool is_clipped = true;
   const float opacity = 1.0f;
-  const SkXfermode::Mode blend_mode = SkXfermode::kSrcOver_Mode;
+  const SkBlendMode blend_mode = SkBlendMode::kSrcOver;
   int sorting_context_id = 0;
   SharedQuadState* shared_state = render_pass->CreateAndAppendSharedQuadState();
   shared_state->SetAll(quad_to_target_transform, layer_bounds,