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

content/browser/mojo/mojo_application_host.cc

Index: content/browser/mojo/mojo_application_host.cc
diff --git a/content/browser/mojo/mojo_application_host.cc b/content/browser/mojo/mojo_application_host.cc
index b1a9382f9adfd02e361b142e79b3f1731343699a..802915c8c544e013314e87502787889a1e941b69 100644
--- a/content/browser/mojo/mojo_application_host.cc
+++ b/content/browser/mojo/mojo_application_host.cc
@@ -7,11 +7,26 @@
 #include "content/common/mojo/mojo_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "ipc/ipc_sender.h"
+
+#if defined(USE_CHROME_EDK)
+#include "mojo/edk/embedder/platform_channel_pair.h"
+#else
 #include "third_party/mojo/src/mojo/edk/embedder/platform_channel_pair.h"
+#endif
 
 namespace content {
 namespace {
 
+#if defined(USE_CHROME_EDK)
+base::PlatformFile PlatformFileFromScopedPlatformHandle(
+    mojo::edk::ScopedPlatformHandle handle) {
+#if defined(OS_POSIX)
+  return handle.release().fd;
+#elif defined(OS_WIN)
+  return handle.release().handle;
+#endif
+}
+#else
 base::PlatformFile PlatformFileFromScopedPlatformHandle(
     mojo::embedder::ScopedPlatformHandle handle) {
 #if defined(OS_POSIX)
@@ -20,6 +35,7 @@ base::PlatformFile PlatformFileFromScopedPlatformHandle(
   return handle.release().handle;
 #endif
 }
+#endif
 
 class ApplicationSetupImpl : public ApplicationSetup {
  public:
@@ -60,8 +76,11 @@ MojoApplicationHost::~MojoApplicationHost() {
 
 bool MojoApplicationHost::Init() {
   DCHECK(!client_handle_.is_valid()) << "Already initialized!";
-
+#if defined(USE_CHROME_EDK)
+  mojo::edk::PlatformChannelPair channel_pair;
+#else
   mojo::embedder::PlatformChannelPair channel_pair;
+#endif
 
   scoped_refptr<base::TaskRunner> io_task_runner;
   if (io_task_runner_override_) {