Add infrastructure to run tests on android.

mojo/edk/embedder/embedder_unittest.cc

 // 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.
 
 #include "mojo/edk/embedder/embedder.h"
 
 #include <string.h>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 264 matching lines @@
 //   3.                          "FOO"
 //   4.  "Bar"+mp1
 //   5.  (close)
 //   6.              (close)
 //   7.                                                              "baz"
 //   8.                                                              (closed)
 //   9.                                      "quux"+mp2
 //  10.                          (close)
 //  11.                                      (wait/cl.)
 //  12.                                                  (wait/cl.)
-TEST_F(EmbedderTest, MultiprocessChannels) {
+#if defined(OS_ANDROID)
+// Android multi-process tests are not executing the new process. This is flaky.

[viettrungluu, 2014/11/25 16:45:09]

Maybe just say "On Android we can't exec(), so we don't support multiprocess
tests."?

(Would it be flaky? Or just not work? Is what I said accurate?)

Maybe also file a bug and reference it here. (We can dream of this being
resolved someday.)

[qsr, 2014/11/25 17:17:49]

 We can exec, but with the current infrastructure for tests, there is nothing to
exec. We don't have an executable. The native code is in a .so loaded by the
java side.

+#define MAYBE_MultiprocessChannels DISABLED_MultiprocessChannels
+#else
+#define MAYBE_MultiprocessChannels MultiprocessChannels
+#endif  // defined(OS_ANDROID)
+TEST_F(EmbedderTest, MAYBE_MultiprocessChannels) {
   mojo::embedder::test::InitWithSimplePlatformSupport();
   mojo::test::MultiprocessTestHelper multiprocess_test_helper;
   multiprocess_test_helper.StartChild("MultiprocessChannelsClient");
 
   {
     ScopedTestChannel server_channel(
         test_io_thread()->task_runner(),
         multiprocess_test_helper.server_platform_handle.Pass());
     MojoHandle server_mp = server_channel.bootstrap_message_pipe();
     EXPECT_NE(server_mp, MOJO_HANDLE_INVALID);
@@ skipping 188 matching lines @@
 
   EXPECT_TRUE(test::Shutdown());
 }
 
 // TODO(vtl): Test immediate write & close.
 // TODO(vtl): Test broken-connection cases.
 
 }  // namespace
 }  // namespace embedder
 }  // namespace mojo