[subresource_filter] add //chrome level unit test harness

components/subresource_filter/content/browser/BUILD.gn

 # Copyright 2016 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.
 
 static_library("browser") {
   sources = [
     "activation_state_computing_navigation_throttle.cc",
     "activation_state_computing_navigation_throttle.h",
     "async_document_subresource_filter.cc",
     "async_document_subresource_filter.h",
@@ skipping 30 matching lines @@
   public_deps = [
     "//ui/base",
   ]
 }
 
 static_library("test_support") {
   testonly = true
   sources = [
     "async_document_subresource_filter_test_utils.cc",
     "async_document_subresource_filter_test_utils.h",
+    "fake_safe_browsing_database_manager.cc",
+    "fake_safe_browsing_database_manager.h",
   ]
   deps = [
     ":browser",
     "//base/test:test_support",
+    "//components/safe_browsing_db:test_database_manager",

[engedy, 2017/04/20 12:34:33]

I'm not sure how strongly this is enforced, but someone complained on another CL
that the subresource filter's headers include a lot of other headers from other
components, but don't expose the source component as a public deps. This might
be problematic at least in theory because the dependent translation unit that
will indirectly include those headers will not inherit include directory
configs.

Consider moving this to public_deps (probably many other deps need to be moved,
but let's do that in another CL).

[Charlie Harrison, 2017/04/20 15:55:20]

Done.

     "//components/subresource_filter/core/common",
+    "//content/public/browser",
     "//testing/gtest:gtest",
+    "//url",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "activation_state_computing_navigation_throttle_unittest.cc",
     "async_document_subresource_filter_unittest.cc",
     "content_ruleset_service_unittest.cc",
     "content_subresource_filter_driver_factory_unittest.cc",
@@ skipping 12 matching lines @@
     "//components/subresource_filter/core/browser",
     "//components/subresource_filter/core/browser:test_support",
     "//components/subresource_filter/core/common",
     "//components/subresource_filter/core/common:test_support",
     "//content/test:test_support",
     "//ipc",
     "//ipc:test_support",
     "//testing/gtest",
   ]
 }