Mojo: Move platform handle/channel stuff in system to embedder namespace.

mojo/system/raw_channel.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SYSTEM_RAW_CHANNEL_H_
 #define MOJO_SYSTEM_RAW_CHANNEL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "mojo/system/constants.h"
 #include "mojo/system/scoped_platform_handle.h"
 #include "mojo/system/system_impl_export.h"
 
 namespace base {
 class MessageLoop;
 }
 
 namespace mojo {
 namespace system {
 
 class MessageInTransit;
 
-// This simply wraps an |int| file descriptor on POSIX and a |HANDLE| on
-// Windows, but we don't want to impose, e.g., the inclusion of windows.h on
-// everyone.
-struct PlatformHandle;
-
 // |RawChannel| is an interface to objects that wrap an OS "pipe". It presents
 // the following interface to users:
 //  - Receives and dispatches messages on a thread (running a |MessageLoop|; it
 //    must be a |MessageLoopForIO| in the case of the POSIX libevent
 //    implementation).
 //  - Provides a thread-safe way of writing messages (|WriteMessage()|);
 //    writing/queueing messages will not block and is atomic from the point of
 //    view of the caller. If necessary, messages are queued (to be written on
 //    the aforementioned thread).
 //
@@ skipping 25 matching lines @@
     virtual void OnFatalError(FatalError fatal_error) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
   // Static factory method. |handle| should be a handle to a
   // (platform-appropriate) bidirectional communication channel (e.g., a socket
   // on POSIX, a named pipe on Windows). Does *not* take ownership of |delegate|
   // and |message_loop|, which must remain alive while this object does.
-  static RawChannel* Create(ScopedPlatformHandle handle,
+  static RawChannel* Create(embedder::ScopedPlatformHandle handle,
                             Delegate* delegate,
                             base::MessageLoop* message_loop);
 
   // This must be called (on the I/O thread) before this object is used. Returns
   // true on success. On failure, |Shutdown()| should *not* be called.
   virtual bool Init() = 0;
 
   // This must be called (on the I/O thread) before this object is destroyed.
   virtual void Shutdown() = 0;
 
@@ skipping 12 matching lines @@
   Delegate* const delegate_;
   base::MessageLoop* const message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(RawChannel);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_RAW_CHANNEL_H_