Move test runner to a component

content/test/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/module_args/v8.gni")
 import("//testing/test.gni")
@@ skipping 201 matching lines @@
     testonly = true
     sources = rebase_path(
             content_tests_gypi_values.layouttest_support_content_sources,
             ".",
             "//content")
 
     deps = [
       ":test_support",
       "//cc",
       "//cc/blink",
+      "//components/test_runner:test_runner",
       "//content/public/common",
       "//skia",
       "//v8",
       "//ui/accessibility:ax_gen",
     ]
 
     if (is_android) {
       deps += [ ":jni" ]
     }
   }
@@ skipping 453 matching lines @@
       "//gpu/blink",
       "//testing/gtest",
       "//third_party/WebKit/public:blink",
       "//ui/base",
       "//ui/gfx",
       "//ui/gfx/geometry",
       "//ui/gl",
     ]
   }
 }