Replace LayerImpl::sorting_context_id with transform reference.

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/animation/animation_host.h"
 #include "cc/base/math_util.h"
@@ skipping 1050 matching lines @@
     transform.Translate(50.0, 50.0);
     transform.ApplyPerspectiveDepth(100.0);
     transform.Translate3d(0.0, 0.0, 110.0);
     transform.Translate(-50.0, -50.0);
 
     TestContentLayerImpl* parent = this->CreateRoot(
         this->identity_matrix, gfx::PointF(), gfx::Size(100, 100));
     TestContentLayerImpl* layer = this->CreateDrawingLayer(
         parent, transform, gfx::PointF(), gfx::Size(100, 100), true);
     parent->test_properties()->should_flatten_transform = false;
-    parent->Set3dSortingContextId(1);
+    parent->test_properties()->sorting_context_id = 1;
     layer->test_properties()->should_flatten_transform = false;
-    layer->Set3dSortingContextId(1);
+    layer->test_properties()->sorting_context_id = 1;
     this->CalcDrawEtc(parent);
 
     TestOcclusionTrackerWithClip occlusion(gfx::Rect(0, 0, 1000, 1000));
 
     // The |layer| is entirely behind the camera and should not occlude.
     this->VisitLayer(layer, &occlusion);
     this->EnterLayer(parent, &occlusion);
     EXPECT_TRUE(occlusion.occlusion_from_inside_target().IsEmpty());
     EXPECT_TRUE(occlusion.occlusion_from_outside_target().IsEmpty());
   }
@@ skipping 1341 matching lines @@
     EXPECT_EQ(gfx::Rect(),
               occlusion.UnoccludedSurfaceContentRect(
                   surface, gfx::Rect(80, 70, 50, 50)));
   }
 };
 
 ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestUnoccludedSurfaceQuery)
 
 }  // namespace
 }  // namespace cc