Remove unused variables, cc/ edition.

cc/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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
@@ skipping 976 matching lines @@
     "quads/draw_quad_perftest.cc",
     "raster/raster_buffer_provider_perftest.cc",
     "raster/task_graph_runner_perftest.cc",
     "raster/texture_compressor_perftest.cc",
     "surfaces/surface_aggregator_perftest.cc",
     "test/cc_test_suite.cc",
     "test/run_all_perftests.cc",
     "tiles/tile_manager_perftest.cc",
     "trees/layer_tree_host_common_perftest.cc",
     "trees/layer_tree_host_perftest.cc",
-    "trees/occlusion_tracker_perftest.cc",
   ]
 
   deps = [
     ":cc",
     ":test_support",
     "//base",
     "//base/test:test_support",
     "//cc/ipc",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//gpu",
     "//gpu:test_support",
     "//gpu/command_buffer/common:gles2_utils",
     "//media",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 
   # This target should not require the Chrome executable to run.
   assert_no_deps = [ "//chrome" ]
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the cc_unittests_run target in cc_tests.gyp.