command_buffer: Implement glGetStringi for GL ES 3.0

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 109 matching lines @@
     "command_buffer/tests/gl_ext_srgb_unittest.cc",
     "command_buffer/tests/gl_fence_sync_unittest.cc",
     "command_buffer/tests/gl_gpu_memory_buffer_unittest.cc",
     "command_buffer/tests/gl_lose_context_chromium_unittest.cc",
     "command_buffer/tests/gl_manager.cc",
     "command_buffer/tests/gl_manager.h",
     "command_buffer/tests/gl_pointcoord_unittest.cc",
     "command_buffer/tests/gl_program_unittest.cc",
     "command_buffer/tests/gl_query_unittest.cc",
     "command_buffer/tests/gl_readback_unittest.cc",
+    "command_buffer/tests/gl_request_extension_unittest.cc",
     "command_buffer/tests/gl_shared_resources_unittest.cc",
     "command_buffer/tests/gl_stream_draw_unittest.cc",
     "command_buffer/tests/gl_test_utils.cc",
     "command_buffer/tests/gl_test_utils.h",
     "command_buffer/tests/gl_tests_main.cc",
     "command_buffer/tests/gl_texture_mailbox_unittest.cc",
     "command_buffer/tests/gl_texture_storage_unittest.cc",
     "command_buffer/tests/gl_unittest.cc",
     "command_buffer/tests/gl_unittests_android.cc",
     "command_buffer/tests/gl_virtual_contexts_unittest.cc",
@@ skipping 165 matching lines @@
     "//base",
     "//base/test:test_support",
     "//gpu/command_buffer/service",
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }