Use Mojo pipes to signal sync IPC events

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.
 
 import("//build/config/features.gni")
 
 assert(!is_android || enable_plugins,
        "//ppapi should not be referenced when is_android && !enable_plugins")
 
 if (is_mac) {
@@ skipping 182 matching lines @@
     "shared_impl/var_tracker_unittest.cc",
   ]
 
   deps = [
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//gpu/ipc/common:command_buffer_traits",
     "//ipc",
     "//ipc:test_support",
     "//media:shared_memory_support",
+    "//mojo/edk/system",
     "//ppapi/host",
     "//ppapi/proxy",
     "//ppapi/proxy:test_support",
     "//ppapi/shared_impl",
     "//ppapi/shared_impl:test_support",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/surface",
   ]
 }
 
 test("ppapi_perftests") {
   sources = [
     "proxy/ppapi_perftests.cc",
     "proxy/ppp_messaging_proxy_perftest.cc",
   ]
 
   deps = [
     "//base/test:test_support",
+    "//mojo/edk/system",
     "//ppapi/proxy",
     "//ppapi/proxy:test_support",
     "//ppapi/shared_impl",
     "//ppapi/shared_impl:test_support",
     "//testing/gtest",
   ]
 }
 
 executable("pepper_hash_for_uma") {
   sources = [
@@ skipping 76 matching lines @@
   group("ppapi_nacl_tests_all") {
     data_deps = [
       ":copy_test_files",
       ":ppapi_nacl_tests(//build/toolchain/nacl:clang_newlib_${target_cpu})",
       ":ppapi_nacl_tests(//build/toolchain/nacl:glibc_${target_cpu})",
       ":ppapi_nacl_tests(//build/toolchain/nacl:newlib_pnacl)",
       ":ppapi_nacl_tests(//build/toolchain/nacl:newlib_pnacl_nonsfi)",
     ]
   }
 }