Have compositor_model_bench target near its source files.

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 273 matching lines @@
 
   deps = [
     "//base",
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/angle:translator_static",
   ]
 }
-
-if (is_linux && !is_chromeos && target_cpu != "arm" && use_x11) {
-  executable("compositor_model_bench") {
-    sources = [
-      "tools/compositor_model_bench/compositor_model_bench.cc",
-      "tools/compositor_model_bench/forward_render_model.cc",
-      "tools/compositor_model_bench/render_model_utils.cc",
-      "tools/compositor_model_bench/render_models.cc",
-      "tools/compositor_model_bench/render_tree.cc",
-      "tools/compositor_model_bench/shaders.cc",
-    ]
-
-    libs = [ "GL" ]
-
-    configs += [ "//build/config/linux:x11" ]
-
-    deps = [
-      "//base",
-      "//ui/gl",
-    ]
-  }
-}