Add a Mojo EDK for Chrome that uses one OS pipe per message pipe.

mojo/edk/system/run_all_unittests.cc

Index: mojo/edk/system/run_all_unittests.cc
diff --git a/third_party/mojo/src/mojo/edk/system/run_all_unittests.cc b/mojo/edk/system/run_all_unittests.cc
similarity index 79%
copy from third_party/mojo/src/mojo/edk/system/run_all_unittests.cc
copy to mojo/edk/system/run_all_unittests.cc
index cd6133741bbc3e2a12817fded892a29ee382f92b..b68f6e207e4c415f350b686b3d3f22eba16f9800 100644
--- a/third_party/mojo/src/mojo/edk/system/run_all_unittests.cc
+++ b/mojo/edk/system/run_all_unittests.cc
@@ -3,8 +3,10 @@
 // found in the LICENSE file.
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
+#include "mojo/edk/embedder/embedder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 int main(int argc, char** argv) {
@@ -15,8 +17,10 @@ int main(int argc, char** argv) {
 #if !defined(OS_ANDROID)
   testing::GTEST_FLAG(death_test_style) = "threadsafe";
 #endif
-
+  mojo::edk::Init();
   base::TestSuite test_suite(argc, argv);
+  // TODO(use_chrome_edk): temporary to force new EDK.
+  base::CommandLine::ForCurrentProcess()->AppendSwitch("--use-new-edk");
 
   return base::LaunchUnitTests(
       argc, argv,