Update from https://crrev.com/316786

net/test/run_all_unittests.cc

Index: net/test/run_all_unittests.cc
diff --git a/net/test/run_all_unittests.cc b/net/test/run_all_unittests.cc
index e86487e6fedf51c510db59fd6b9f44a21df4c405..d9cf3540882d859f73ed30ad86ac5e8392bca0ba 100644
--- a/net/test/run_all_unittests.cc
+++ b/net/test/run_all_unittests.cc
@@ -27,6 +27,10 @@
 #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;
 
@@ -69,6 +73,10 @@ int main(int argc, char** argv) {
   net::ProxyResolverV8::EnsureIsolateCreated();
 #endif
 
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+  mojo::embedder::test::InitWithSimplePlatformSupport();
+#endif
+
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&NetTestSuite::Run,
                              base::Unretained(&test_suite)));