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

ipc/mojo/ipc_mojo_bootstrap_unittest.cc

Index: ipc/mojo/ipc_mojo_bootstrap_unittest.cc
diff --git a/ipc/mojo/ipc_mojo_bootstrap_unittest.cc b/ipc/mojo/ipc_mojo_bootstrap_unittest.cc
index 1c3d7eea44dd573b6c7ff13e05f6196485940d4f..528c23503327b7152bab718dc68d3816151e1d12 100644
--- a/ipc/mojo/ipc_mojo_bootstrap_unittest.cc
+++ b/ipc/mojo/ipc_mojo_bootstrap_unittest.cc
@@ -23,7 +23,8 @@ class TestingDelegate : public IPC::MojoBootstrap::Delegate {
  public:
   TestingDelegate() : passed_(false) {}
 
-  void OnPipeAvailable(mojo::embedder::ScopedPlatformHandle handle) override;
+  void OnPipeAvailable(mojo::embedder::ScopedPlatformHandle handle,
+                       int32 peer_pid) override;
   void OnBootstrapError() override;
 
   bool passed() const { return passed_; }
@@ -33,7 +34,8 @@ class TestingDelegate : public IPC::MojoBootstrap::Delegate {
 };
 
 void TestingDelegate::OnPipeAvailable(
-    mojo::embedder::ScopedPlatformHandle handle) {
+    mojo::embedder::ScopedPlatformHandle handle,
+    int32 peer_pid) {
   passed_ = true;
   base::MessageLoop::current()->Quit();
 }