Don't run DirectRenderer versions of LayerTreeTest unless explicit.

cc/output/delegating_renderer_unittest.cc

 // Copyright 2013 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/output/delegating_renderer.h"
 
 #include <stdint.h>
 
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/layer_tree_test.h"
@@ skipping 58 matching lines @@
 
     EXPECT_EQ(0u, last_frame->delegated_frame_data->resource_list.size());
     EXPECT_EQ(1u, last_frame->delegated_frame_data->render_pass_list.size());
 
     EndTest();
   }
 
   gfx::Rect drawn_viewport_;
 };
 
-SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(DelegatingRendererTestDraw);
+SINGLE_AND_MULTI_THREAD_TEST_F(DelegatingRendererTestDraw);
 
 class DelegatingRendererTestResources : public DelegatingRendererTest {
  public:
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 
   void AfterTest() override {}
 
   DrawResult PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
                                    LayerTreeHostImpl::FrameData* frame,
                                    DrawResult draw_result) override {
@@ skipping 28 matching lines @@
     // mask resource used when drawing the child render pass, as well as its
     // replica (it's added twice). The number 10 may change if
     // AppendOneOfEveryQuadType() is updated, and the value here should be
     // updated accordingly.
     EXPECT_EQ(22u, last_frame->delegated_frame_data->resource_list.size());
 
     EndTest();
   }
 };
 
-SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(
-    DelegatingRendererTestResources);
+SINGLE_AND_MULTI_THREAD_TEST_F(DelegatingRendererTestResources);
 
 }  // namespace cc