cc: Delete the Renderer base class.

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 600920a7ca3d69be57817ee3deb5b9bf044fc2a5..ef1cddd5f9e3d56e338841b5c2e25a2b31135133 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -610,6 +610,8 @@ static_library("test_support") {
     "test/fake_client_picture_cache.h",
     "test/fake_content_layer_client.cc",
     "test/fake_content_layer_client.h",
+    "test/fake_direct_renderer_client.cc",
+    "test/fake_direct_renderer_client.h",
     "test/fake_engine_picture_cache.cc",
     "test/fake_engine_picture_cache.h",
     "test/fake_external_begin_frame_source.cc",
@@ -647,8 +649,6 @@ static_library("test_support") {
     "test/fake_raster_source.h",
     "test/fake_recording_source.cc",
     "test/fake_recording_source.h",
-    "test/fake_renderer_client.cc",
-    "test/fake_renderer_client.h",
     "test/fake_rendering_stats_instrumentation.h",
     "test/fake_resource_provider.h",
     "test/fake_scoped_ui_resource.cc",
@@ -865,7 +865,6 @@ test("cc_unittests") {
     "output/overlay_unittest.cc",
     "output/renderer_pixeltest.cc",
     "output/renderer_settings_unittest.cc",
-    "output/renderer_unittest.cc",
     "output/shader_unittest.cc",
     "output/software_renderer_unittest.cc",
     "output/texture_mailbox_deleter_unittest.cc",