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

mojo/runner/child_process.cc

Index: mojo/runner/child_process.cc
diff --git a/mojo/runner/child_process.cc b/mojo/runner/child_process.cc
index dc9b59f2a77cbfe5ac52fe6c376847fef41178f5..d662bdf850f1c25118145054ac15b1b33724e759 100644
--- a/mojo/runner/child_process.cc
+++ b/mojo/runner/child_process.cc
@@ -20,11 +20,6 @@
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
-#include "mojo/edk/embedder/embedder.h"
-#include "mojo/edk/embedder/platform_channel_pair.h"
-#include "mojo/edk/embedder/process_delegate.h"
-#include "mojo/edk/embedder/scoped_platform_handle.h"
-#include "mojo/edk/embedder/simple_platform_support.h"
 #include "mojo/message_pump/message_pump_mojo.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/system/core.h"
@@ -32,6 +27,20 @@
 #include "mojo/runner/native_application_support.h"
 #include "mojo/runner/switches.h"
 
+#if defined(USE_CHROME_EDK)
+#include "mojo/edk/embedder/embedder.h"
+#include "mojo/edk/embedder/platform_channel_pair.h"
+#include "mojo/edk/embedder/process_delegate.h"
+#include "mojo/edk/embedder/scoped_platform_handle.h"
+#include "mojo/edk/embedder/simple_platform_support.h"
+#else
+#include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
+#include "third_party/mojo/src/mojo/edk/embedder/platform_channel_pair.h"
+#include "third_party/mojo/src/mojo/edk/embedder/process_delegate.h"
+#include "third_party/mojo/src/mojo/edk/embedder/scoped_platform_handle.h"
+#include "third_party/mojo/src/mojo/edk/embedder/simple_platform_support.h"
+#endif
+
 #if defined(OS_LINUX) && !defined(OS_ANDROID)
 #include "base/rand_util.h"
 #include "base/sys_info.h"
@@ -199,11 +208,16 @@ class ChildControllerImpl : public ChildController {
     scoped_ptr<ChildControllerImpl> impl(
         new ChildControllerImpl(app_context, app_library, unblocker));
 
+#if defined(USE_CHROME_EDK)
+    ScopedMessagePipeHandle host_message_pipe(
+        embedder::CreateMessagePipe(platform_channel.Pass()));
+#else
     ScopedMessagePipeHandle host_message_pipe(embedder::CreateChannel(
         platform_channel.Pass(),
         base::Bind(&ChildControllerImpl::DidCreateChannel,
                    base::Unretained(impl.get())),
         base::ThreadTaskRunnerHandle::Get()));
+#endif
 
     impl->Bind(host_message_pipe.Pass());
 
@@ -242,17 +256,21 @@ class ChildControllerImpl : public ChildController {
       : app_context_(app_context),
         app_library_(app_library),
         unblocker_(unblocker),
+#if !defined(USE_CHROME_EDK)
         channel_info_(nullptr),
+#endif
         binding_(this) {
     binding_.set_connection_error_handler([this]() { OnConnectionError(); });
   }
 
+#if !defined(USE_CHROME_EDK)
   // Callback for |embedder::CreateChannel()|.
   void DidCreateChannel(embedder::ChannelInfo* channel_info) {
     DVLOG(2) << "ChildControllerImpl::DidCreateChannel()";
     DCHECK(thread_checker_.CalledOnValidThread());
     channel_info_ = channel_info;
   }
+#endif
 
   static void StartAppOnMainThread(
       base::NativeLibrary app_library,
@@ -268,7 +286,9 @@ class ChildControllerImpl : public ChildController {
   Blocker::Unblocker unblocker_;
   StartAppCallback on_app_complete_;
 
+#if !defined(USE_CHROME_EDK)
   embedder::ChannelInfo* channel_info_;
+#endif
   Binding<ChildController> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildControllerImpl);