Fix a bunch of mojo_public_*_unittests with the new EDK.

mojo/public/cpp/system/tests/core_unittest.cc

Index: mojo/public/cpp/system/tests/core_unittest.cc
diff --git a/mojo/public/cpp/system/tests/core_unittest.cc b/mojo/public/cpp/system/tests/core_unittest.cc
index b3ebea2d202a1f1f4ffde43b8c370997e8b76168..c717c2f205be257c69d73273ee93168d553a2d0d 100644
--- a/mojo/public/cpp/system/tests/core_unittest.cc
+++ b/mojo/public/cpp/system/tests/core_unittest.cc
@@ -365,8 +365,12 @@ TEST(CoreCppTest, TearDownWithMessagesEnqueued) {
 
     // Send a handle over the previously-establish message pipe.
     ScopedMessagePipeHandle h2;
-    ScopedMessagePipeHandle h3;
-    CreateMessagePipe(nullptr, &h2, &h3);
+    ScopedMessagePipeHandle h3;
+    MojoCreateMessagePipeOptions options;
+    options.struct_size = sizeof(MojoCreateMessagePipeOptions);
+    options.flags = MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE;
+    if (CreateMessagePipe(&options, &h2, &h3) != MOJO_RESULT_OK)
+      CreateMessagePipe(nullptr, &h2, &h3);  // Must be old EDK.
 
     // Write a message to |h2|, before we send |h3|.
     const char kWorld[] = "world!";
@@ -418,8 +422,12 @@ TEST(CoreCppTest, TearDownWithMessagesEnqueued) {
 
     // Send a handle over the previously-establish message pipe.
     ScopedMessagePipeHandle h2;
-    ScopedMessagePipeHandle h3;
-    CreateMessagePipe(nullptr, &h2, &h3);
+    ScopedMessagePipeHandle h3;
+    MojoCreateMessagePipeOptions options;
+    options.struct_size = sizeof(MojoCreateMessagePipeOptions);
+    options.flags = MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE;
+    if (CreateMessagePipe(&options, &h2, &h3) != MOJO_RESULT_OK)
+      CreateMessagePipe(nullptr, &h2, &h3);  // Must be old EDK.
 
     // Write a message to |h2|, before we send |h3|.
     const char kWorld[] = "world!";