gpu: Add base class for gpu service tests

gpu/BUILD.gn

 # Copyright 2014 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.
 
 # GYP-to-GN project mappings:
 #
 #  gpu.gyp:command_buffer_client => //gpu/command_buffer/client
 #
 #  gpu.gyp:command_buffer_common => //gpu/command_buffer/common
 #
@@ skipping 167 matching lines @@
     "command_buffer/service/gles2_cmd_decoder_unittest_base.h",
     "command_buffer/service/gles2_cmd_decoder_unittest_context_state.cc",
     "command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc",
     "command_buffer/service/gles2_cmd_decoder_unittest_framebuffers.cc",
     "command_buffer/service/gles2_cmd_decoder_unittest_programs.cc",
     "command_buffer/service/gles2_cmd_decoder_unittest_textures.cc",
     "command_buffer/service/gles2_cmd_decoder_unittest_attribs.cc",
     "command_buffer/service/gl_surface_mock.cc",
     "command_buffer/service/gl_surface_mock.h",
     "command_buffer/service/gpu_scheduler_unittest.cc",
+    "command_buffer/service/gpu_service_test.cc",
+    "command_buffer/service/gpu_service_test.h",
     "command_buffer/service/id_manager_unittest.cc",
     "command_buffer/service/mailbox_manager_unittest.cc",
     "command_buffer/service/memory_program_cache_unittest.cc",
     "command_buffer/service/mocks.cc",
     "command_buffer/service/mocks.h",
     "command_buffer/service/program_manager_unittest.cc",
     "command_buffer/service/query_manager_unittest.cc",
     "command_buffer/service/renderbuffer_manager_unittest.cc",
     "command_buffer/service/program_cache_unittest.cc",
     "command_buffer/service/shader_manager_unittest.cc",
@@ skipping 29 matching lines @@
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/angle:translator",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//gpu/command_buffer/client:gles2_c_lib",
     "//gpu/command_buffer/client:gles2_implementation_client_side_arrays",
   ]
 }