Implement a basic PPAPI plugin for Blink layout tests.

ppapi/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.
 
 copy("copy_test_files") {
   visibility = [ ":*" ]
   sources = [
     # Keep "test_case.html.mock-http-headers" with "test_case.html".
     "tests/ppapi_nacl_tests_newlib.nmf",
     "tests/test_case.html",
@@ skipping 49 matching lines @@
     "tests/test_utils.cc",
   ]
 
   deps = [
     "//build/config/sanitizers:deps",
     "//ppapi/cpp",
     "//ppapi/shared_impl",
   ]
 }
 
+shared_library("blink_test_plugin") {
+  sources = [
+    "tests/blink_test_plugin.cc",
+  ]
+
+  deps = [
+    "//build/config/sanitizers:deps",
+    "//ppapi/cpp",
+    "//ppapi/shared_impl",
+  ]
+}
+
 test("ppapi_unittests") {
   sources = [
     "host/resource_message_filter_unittest.cc",
     "proxy/device_enumeration_resource_helper_unittest.cc",
     "proxy/file_chooser_resource_unittest.cc",
     "proxy/file_system_resource_unittest.cc",
     "proxy/flash_resource_unittest.cc",
     "proxy/interface_list_unittest.cc",
     "proxy/mock_resource.cc",
     "proxy/mock_resource.h",
@@ skipping 264 matching lines @@
       ":ppapi_nacl_tests_nmf(//build/toolchain/nacl:glibc_${target_cpu})",
     ]
     if (enable_pnacl) {
       data_deps += [
         ":ppapi_nacl_tests_nmf(//build/toolchain/nacl:newlib_pnacl)",
         ":ppapi_nacl_tests_pnacl_nonsfi_nmf(//build/toolchain/nacl:newlib_pnacl_nonsfi)",
       ]
     }
   }
 }