command_buffer: Avoid uninitialized read in ShaderTranslatorCache

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 186 matching lines @@
     "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/valuebuffer_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",
     "command_buffer/service/shader_translator_unittest.cc",
+    "command_buffer/service/shader_translator_cache_unittest.cc",
     "command_buffer/service/test_helper.cc",
     "command_buffer/service/test_helper.h",
     "command_buffer/service/texture_manager_unittest.cc",
     "command_buffer/service/transfer_buffer_manager_unittest.cc",
     "command_buffer/service/vertex_attrib_manager_unittest.cc",
     "command_buffer/service/vertex_array_manager_unittest.cc",
     "command_buffer/service/gpu_tracer_unittest.cc",
     "config/gpu_blacklist_unittest.cc",
     "config/gpu_control_list_entry_unittest.cc",
     "config/gpu_control_list_number_info_unittest.cc",
@@ skipping 33 matching lines @@
   ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/angle:translator_static",
   ]
 }