Add Mojo application test support to Chromium.

mojo/environment/environment.cc

Index: mojo/environment/environment.cc
diff --git a/mojo/environment/environment.cc b/mojo/environment/environment.cc
index f8611139381a1440940a85821edbc73c5751112f..418d89e60e6cd453826ac31d814ef0946f3a7348 100644
--- a/mojo/environment/environment.cc
+++ b/mojo/environment/environment.cc
@@ -6,6 +6,7 @@
 
 #include "mojo/environment/default_async_waiter_impl.h"
 #include "mojo/environment/default_logger_impl.h"
+#include "mojo/environment/default_run_loop_impl.h"
 
 namespace mojo {
 
@@ -33,4 +34,14 @@ const MojoLogger* Environment::GetDefaultLogger() {
   return internal::GetDefaultLoggerImpl();
 }
 
+// static
+void Environment::InstantiateDefaultRunLoop() {
+  internal::InstantiateDefaultRunLoopImpl();
+}
+
+// static
+void Environment::DestroyDefaultRunLoop() {
+  internal::DestroyDefaultRunLoopImpl();
+}
+
 }  // namespace mojo