cc: Get rid of non-delegated rendering in most cc unit tests.

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 69 matching lines @@
     return this->GetCurrentOcclusionForContributingSurface(
                      surface->draw_transform())
         .GetUnoccludedContentRect(content_rect);
   }
 };
 
 class OcclusionTrackerTest : public testing::Test {
  protected:
   explicit OcclusionTrackerTest(bool opaque_layers)
       : opaque_layers_(opaque_layers),
-        client_(FakeLayerTreeHostClient::DIRECT_3D),
         host_(FakeLayerTreeHost::Create(&client_, &task_graph_runner_)),
         next_layer_impl_id_(1) {}
 
   virtual void RunMyTest() = 0;
 
   void TearDown() override { DestroyLayers(); }
 
   TestContentLayerImpl* CreateRoot(const gfx::Transform& transform,
                                    const gfx::PointF& position,
                                    const gfx::Size& bounds) {
@@ skipping 2523 matching lines @@
     EXPECT_EQ(gfx::Rect(),
               occlusion.UnoccludedSurfaceContentRect(
                   surface, gfx::Rect(80, 70, 50, 50)));
   }
 };
 
 ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestUnoccludedSurfaceQuery)
 
 }  // namespace
 }  // namespace cc