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

cc/layers/picture_image_layer_unittest.cc

 // Copyright 2015 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/layers/picture_image_layer.h"
 
 #include "cc/playback/display_item.h"
 #include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/skia_common.h"
 #include "cc/test/test_task_graph_runner.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkSurface.h"
 
 namespace cc {
 namespace {
 
 TEST(PictureImageLayerTest, PaintContentsToDisplayList) {
   scoped_refptr<PictureImageLayer> layer = PictureImageLayer::Create();
-  FakeLayerTreeHostClient client(FakeLayerTreeHostClient::DIRECT_3D);
+  FakeLayerTreeHostClient client;
   TestTaskGraphRunner task_graph_runner;
   std::unique_ptr<FakeLayerTreeHost> host =
       FakeLayerTreeHost::Create(&client, &task_graph_runner);
   layer->SetLayerTreeHost(host.get());
   gfx::Rect layer_rect(200, 200);
 
   unsigned char image_pixels[4 * 200 * 200] = {0};
   SkImageInfo info =
       SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
   sk_sp<SkSurface> image_surface =
@@ skipping 14 matching lines @@
   unsigned char actual_pixels[4 * 200 * 200] = {0};
   DrawDisplayList(actual_pixels, layer_rect, display_list);
 
   EXPECT_EQ(0, memcmp(actual_pixels, image_pixels, 4 * 200 * 200));
 
   layer->SetLayerTreeHost(nullptr);
 }
 
 }  // namespace
 }  // namespace cc