Move unique name generation and tracking into //content.

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/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 486 matching lines @@
     "//ui/events/blink",
     "//ui/gfx:test_support",
     "//v8",
   ]
 
   if (is_android) {
     deps += [ "//content/public/test/android:test_support_content_jni_headers" ]
   }
 }
 
+static_library("test_runner_support") {
+  testonly = true
+
+  # See comment at the top of //content/BUILD.gn for why this is disabled in
+  # component builds.
+  if (is_component_build) {
+    check_includes = false
+  }
+
+  sources = [
+    "../public/test/test_runner_support.h",
+    "test_runner_support.cc",
+  ]
+
+  deps = [
+    "//content/renderer:for_content_tests",
+    "//third_party/WebKit/public:blink",
+  ]
+}
+
 if (is_android) {
   import("//build/config/android/rules.gni")
 
   jinja_template("content_browsertests_manifest") {
     testonly = true
     input =
         "//content/shell/android/browsertests_apk/AndroidManifest.xml.jinja2"
     output =
         "${target_gen_dir}/content_browsertests_manifest/AndroidManifest.xml"
   }
@@ skipping 1321 matching lines @@
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
 group("fuzzers") {
   deps = [
     "//content/test/fuzzer",
   ]
 }