Mojo: Move PlatformChannelPair to its own files.

mojo/system/platform_channel.cc

Index: mojo/system/platform_channel.cc
diff --git a/mojo/system/platform_channel.cc b/mojo/system/platform_channel.cc
index 9f362f69c1ba0c113fe4187e7f0ce70124db0bc7..159decebd4b432685eaabd38597e869632f769a5 100644
--- a/mojo/system/platform_channel.cc
+++ b/mojo/system/platform_channel.cc
@@ -32,36 +32,5 @@ PlatformChannelHandle PlatformChannel::PassHandle() {
 PlatformChannel::PlatformChannel() {
 }
 
-// -----------------------------------------------------------------------------
-
-PlatformChannelPair::~PlatformChannelPair() {
-  server_handle_.CloseIfNecessary();
-  client_handle_.CloseIfNecessary();
-}
-
-scoped_ptr<PlatformChannel> PlatformChannelPair::CreateServerChannel() {
-  if (!server_handle_.is_valid()) {
-    LOG(WARNING) << "Server handle invalid";
-    return scoped_ptr<PlatformChannel>();
-  }
-
-  scoped_ptr<PlatformChannel> rv =
-      PlatformChannel::CreateFromHandle(server_handle_);
-  server_handle_ = PlatformChannelHandle();
-  return rv.Pass();
-}
-
-scoped_ptr<PlatformChannel> PlatformChannelPair::CreateClientChannel() {
-  if (!client_handle_.is_valid()) {
-    LOG(WARNING) << "Client handle invalid";
-    return scoped_ptr<PlatformChannel>();
-  }
-
-  scoped_ptr<PlatformChannel> rv =
-      PlatformChannel::CreateFromHandle(client_handle_);
-  client_handle_ = PlatformChannelHandle();
-  return rv.Pass();
-}
-
 }  // namespace system
 }  // namespace mojo