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

mojo/edk/system/awakable_list_unittest.cc

Index: mojo/edk/system/awakable_list_unittest.cc
diff --git a/third_party/mojo/src/mojo/edk/system/awakable_list_unittest.cc b/mojo/edk/system/awakable_list_unittest.cc
similarity index 99%
copy from third_party/mojo/src/mojo/edk/system/awakable_list_unittest.cc
copy to mojo/edk/system/awakable_list_unittest.cc
index 728dbc33ee12cb003e17eb4350b099c0bb1ea101..5b5ba8fd1343acd73a691abeb4acaba1fb319869 100644
--- a/third_party/mojo/src/mojo/edk/system/awakable_list_unittest.cc
+++ b/mojo/edk/system/awakable_list_unittest.cc
@@ -16,7 +16,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 namespace {
 
 TEST(AwakableListTest, BasicCancel) {
@@ -352,5 +352,5 @@ TEST(AwakableListTest, KeepAwakablesReturningTrue) {
 }
 
 }  // namespace
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo