IPC::ChannelMojo: Introduce IPC::MojoBootstrap for Windows

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 b7529731ed4be3a531e128f87798472dab3c234d..bd6b9ab36019fe5ad5f74b004644c917dbc7d228 100644
--- a/content/browser/mojo/mojo_application_host.cc
+++ b/content/browser/mojo/mojo_application_host.cc
@@ -10,18 +10,6 @@
 #include "mojo/embedder/platform_channel_pair.h"
 
 namespace content {
-namespace {
-
-base::PlatformFile PlatformFileFromScopedPlatformHandle(
-    mojo::embedder::ScopedPlatformHandle handle) {
-#if defined(OS_POSIX)
-  return handle.release().fd;
-#elif defined(OS_WIN)
-  return handle.release().handle;
-#endif
-}
-
-}  // namespace
 
 MojoApplicationHost::MojoApplicationHost() : did_activate_(false) {
 }
@@ -35,7 +23,7 @@ bool MojoApplicationHost::Init() {
   mojo::embedder::PlatformChannelPair channel_pair;
 
   mojo::ScopedMessagePipeHandle message_pipe = channel_init_.Init(
-      PlatformFileFromScopedPlatformHandle(channel_pair.PassServerHandle()),
+      channel_pair.PassServerHandle().release().ToPlaformFile(),
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
   if (!message_pipe.is_valid())
     return false;
@@ -53,7 +41,7 @@ void MojoApplicationHost::Activate(IPC::Sender* sender,
   DCHECK(client_handle_.is_valid());
 
   base::PlatformFile client_file =
-      PlatformFileFromScopedPlatformHandle(client_handle_.Pass());
+      client_handle_.Pass().release().ToPlaformFile();
   did_activate_ = sender->Send(new MojoMsg_Activate(
       IPC::GetFileHandleForProcess(client_file, process_handle, true)));
 }