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

mojo/edk/test/multiprocess_test_helper.h

Index: mojo/edk/test/multiprocess_test_helper.h
diff --git a/third_party/mojo/src/mojo/edk/test/multiprocess_test_helper.h b/mojo/edk/test/multiprocess_test_helper.h
similarity index 93%
copy from third_party/mojo/src/mojo/edk/test/multiprocess_test_helper.h
copy to mojo/edk/test/multiprocess_test_helper.h
index fb00510f18bd36ec8c4696ef0ac2b36ef5dffc5e..3ff8b85ad9aeb8cf4db841d9cfbc6815f1af3cb2 100644
--- a/third_party/mojo/src/mojo/edk/test/multiprocess_test_helper.h
+++ b/mojo/edk/test/multiprocess_test_helper.h
@@ -16,9 +16,8 @@
 
 namespace mojo {
 
-namespace embedder {
+namespace edk {
 class PlatformChannelPair;
-}
 
 namespace test {
 
@@ -55,13 +54,13 @@ class MultiprocessTestHelper {
   static void ChildSetup();
 
   // For use in the main process:
-  embedder::ScopedPlatformHandle server_platform_handle;
+  ScopedPlatformHandle server_platform_handle;
 
   // For use (and only valid) in the child process:
-  static embedder::ScopedPlatformHandle client_platform_handle;
+  static ScopedPlatformHandle client_platform_handle;
 
  private:
-  scoped_ptr<embedder::PlatformChannelPair> platform_channel_pair_;
+  scoped_ptr<PlatformChannelPair> platform_channel_pair_;
 
   // Valid after |StartChild()| and before |WaitForChildShutdown()|.
   base::Process test_child_;
@@ -75,7 +74,7 @@ class MultiprocessTestHelper {
 #define MOJO_MULTIPROCESS_TEST_CHILD_MAIN(test_child_name) \
   MULTIPROCESS_TEST_MAIN_WITH_SETUP(                       \
       test_child_name##TestChildMain,                      \
-      ::mojo::test::MultiprocessTestHelper::ChildSetup)
+      test::MultiprocessTestHelper::ChildSetup)
 
 // Use this (and |WaitForChildTestShutdown()|) for the child process's "main()",
 // if you want to use |EXPECT_...()| or |ASSERT_...()|; it has a |void| return
@@ -93,6 +92,7 @@ class MultiprocessTestHelper {
   void test_child_name##TestChildTest()
 
 }  // namespace test
+}  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_TEST_MULTIPROCESS_TEST_HELPER_H_