Add infrastructure to run tests on android.

mojo/edk/embedder/test_embedder.h

Index: mojo/edk/embedder/test_embedder.h
diff --git a/mojo/edk/embedder/test_embedder.h b/mojo/edk/embedder/test_embedder.h
index 76917ee539edaec74bc3094df1da2da4920ec26a..5e70a9f93342a2b35e6d081e6ffd820ede31a750 100644
--- a/mojo/edk/embedder/test_embedder.h
+++ b/mojo/edk/embedder/test_embedder.h
@@ -15,6 +15,9 @@ namespace test {
 // you don't care about sandboxing, etc.).
 MOJO_SYSTEM_IMPL_EXPORT void InitWithSimplePlatformSupport();
 
+// This returns whether the embedder is initialized.
+MOJO_SYSTEM_IMPL_EXPORT bool IsInitialized();

[viettrungluu, 2014/11/14 16:36:32]

Nope, not going to allow this: if you don't know when/where you're initializing,
you're doing it wrong.

[qsr, 2014/11/14 17:02:33]

 Well, then I'm open to suggestion. The issue is the following:
Multi process tests on android cannot use exec because there is no executable to
exec. Instead they just use fork, execute the code then exit.

 The code that is executed expect to be in a newly executed process. On the
other hand, the code doing the forking doesn't know anything about the current
context, so it doesn't know if the embedder is initialized or not, but it needs
to make sure there is no embedder before calling the forked code.

 Given this, I cannot know if the embedder is initialized or not...

+
 // This shuts down the global, singleton instance. (Note: "Real" embedders are
 // not expected to ever shut down this instance. This |Shutdown()| function will
 // do more work to ensure that tests don't leak, etc.) Returns true if there