cc: Move blend_mode to the effect tree

cc/trees/occlusion_tracker_unittest.cc

 // Copyright 2012 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/trees/occlusion_tracker.h"
 
 #include <stddef.h>
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer.h"
@@ skipping 1955 matching lines @@
         this->identity_matrix, gfx::PointF(), gfx::Size(100, 100));
     LayerImpl* blend_mode_layer = this->CreateDrawingLayer(
         parent, this->identity_matrix, gfx::PointF(0.f, 0.f),
         gfx::Size(100, 100), true);
     LayerImpl* top_layer = this->CreateDrawingLayer(
         parent, this->identity_matrix, gfx::PointF(10.f, 12.f),
         gfx::Size(20, 22), true);
 
     // Blend mode makes the layer own a surface.
     blend_mode_layer->test_properties()->force_render_surface = true;
-    blend_mode_layer->SetBlendMode(SkXfermode::kMultiply_Mode);
+    blend_mode_layer->test_properties()->blend_mode =
+        SkXfermode::kMultiply_Mode;
 
     this->CalcDrawEtc(parent);
 
     TestOcclusionTrackerWithClip occlusion(gfx::Rect(0, 0, 1000, 1000));
 
     this->VisitLayer(top_layer, &occlusion);
     // |top_layer| occludes.
     EXPECT_EQ(gfx::Rect(10, 12, 20, 22).ToString(),
               occlusion.occlusion_from_inside_target().ToString());
     EXPECT_TRUE(occlusion.occlusion_from_outside_target().IsEmpty());
@@ skipping 639 matching lines @@
     EXPECT_EQ(gfx::Rect(),
               occlusion.UnoccludedSurfaceContentRect(
                   surface, gfx::Rect(80, 70, 50, 50)));
   }
 };
 
 ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestUnoccludedSurfaceQuery)
 
 }  // namespace
 }  // namespace cc