Implement browser-side host resolver Mojo service.

net/test/run_all_unittests.cc

 // Copyright (c) 2012 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.
 
 #include "base/metrics/statistics_recorder.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "build/build_config.h"
 #include "crypto/nss_util.h"
 #include "net/socket/client_socket_pool_base.h"
 #include "net/socket/ssl_server_socket.h"
 #include "net/spdy/spdy_session.h"
 #include "net/test/net_test_suite.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/test/test_file_util.h"
 #include "net/android/net_jni_registrar.h"
 #include "url/android/url_jni_registrar.h"
 #endif
 
 #if !defined(OS_IOS)
 #include "net/proxy/proxy_resolver_v8.h"
 #endif
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 #include "gin/public/isolate_holder.h"
 #endif
 
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+#include "third_party/mojo/src/mojo/edk/embedder/test_embedder.h"
+#endif
+
 using net::internal::ClientSocketPoolBaseHelper;
 using net::SpdySession;
 
 int main(int argc, char** argv) {
   // Record histograms, so we can get histograms data in tests.
   base::StatisticsRecorder::Initialize();
 
 #if defined(OS_ANDROID)
   const base::android::RegistrationMethod kNetTestRegisteredMethods[] = {
     {"NetAndroid", net::android::RegisterJni},
@@ skipping 22 matching lines @@
   net::EnableSSLServerSockets();
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   gin::IsolateHolder::LoadV8Snapshot();
 #endif
 
 #if !defined(OS_IOS)
   net::ProxyResolverV8::EnsureIsolateCreated();
 #endif
 
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+  mojo::embedder::test::InitWithSimplePlatformSupport();

[jamesr, 2015/02/13 00:59:54]

you need a corresponding Shutdown() call after running the test suite

[Anand Mistry (off Chromium), 2015/02/13 02:29:08]

Unfortunately, my test starts CHECK failing after I add this and I have no idea
why:
[32965:32965:0213/130724:4171662561691:ERROR:test_embedder.cc(33)] Mojo embedder
shutdown: Leaking handle 3
[32965:32965:0213/130724:4171662561730:ERROR:test_embedder.cc(33)] Mojo embedder
shutdown: Leaking handle 4
[32965:32965:0213/130724:4171662561755:FATAL:message_pipe_dispatcher.cc(106)]
Check failed: !message_pipe_.
#0 0x0000007489ae base::debug::StackTrace::StackTrace()
#1 0x000000762182 logging::LogMessage::~LogMessage()
#2 0x0000005b6600 mojo::system::MessagePipeDispatcher::~MessagePipeDispatcher()
#3 0x0000005b6649 mojo::system::MessagePipeDispatcher::~MessagePipeDispatcher()
#4 0x00000059d73e base::RefCountedThreadSafe<>::DeleteInternal()
#5 0x00000059d705 base::DefaultRefCountedThreadSafeTraits<>::Destruct()
#6 0x00000059d6de base::RefCountedThreadSafe<>::Release()
#7 0x00000059d68c scoped_refptr<>::Release()
#8 0x00000059bded scoped_refptr<>::~scoped_refptr()
#9 0x0000005a6a2b mojo::system::HandleTable::Entry::~Entry()
#10 0x0000005a8d2c std::pair<>::~pair()
#11 0x0000005aa569 __gnu_cxx::new_allocator<>::destroy<>()
#12 0x0000005aa52b __gnu_cxx::hashtable<>::_M_delete_node()
#13 0x0000005ac11a __gnu_cxx::hashtable<>::clear()
#14 0x0000005ac059 __gnu_cxx::hashtable<>::~hashtable()
#15 0x0000005a8615 __gnu_cxx::hash_map<>::~hash_map()
#16 0x0000005a6a85 mojo::system::HandleTable::~HandleTable()
#17 0x0000005991a9 mojo::system::Core::~Core()
#18 0x0000005991e9 mojo::system::Core::~Core()
#19 0x0000005bb1e1 mojo::embedder::test::Shutdown()

None of the other Mojo uses in Chrome call Shutdown(). As a comparison, I added
this to device_unittests, extension_unittests and mojo_public_bindings_unittests
and they all check fail in exactly the same way. Looks like there's systematic
problem that everyone is getting wrong.

+#endif
+
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&NetTestSuite::Run,
                              base::Unretained(&test_suite)));
 }