Mojo: Move PlatformChannelPair to its own files.

mojo/system/platform_channel_pair.h

Index: mojo/system/platform_channel_pair.h
diff --git a/mojo/system/platform_channel.h b/mojo/system/platform_channel_pair.h
similarity index 77%
copy from mojo/system/platform_channel.h
copy to mojo/system/platform_channel_pair.h
index 47e1e6ac99e38973ebc067d7fe6a3bbdcc68109a..215b96ee8204173d7b2fde65e1cc0ae2913dbf22 100644
--- a/mojo/system/platform_channel.h
+++ b/mojo/system/platform_channel_pair.h
@@ -1,11 +1,11 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2014 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_PLATFORM_CHANNEL_H_
-#define MOJO_SYSTEM_PLATFORM_CHANNEL_H_
+#ifndef MOJO_SYSTEM_PLATFORM_CHANNEL_PAIR_H_
+#define MOJO_SYSTEM_PLATFORM_CHANNEL_PAIR_H_
 
-#include "base/basictypes.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process/launch.h"
 #include "mojo/system/platform_channel_handle.h"
@@ -16,30 +16,7 @@ class CommandLine;
 namespace mojo {
 namespace system {
 
-class MOJO_SYSTEM_IMPL_EXPORT PlatformChannel {
- public:
-  virtual ~PlatformChannel();
-
-  // Creates a channel if you already have the underlying handle for it, taking
-  // ownership of |handle|.
-  static scoped_ptr<PlatformChannel> CreateFromHandle(
-      const PlatformChannelHandle& handle);
-
-  // Returns the channel's handle, passing ownership.
-  PlatformChannelHandle PassHandle();
-
-  bool is_valid() const { return handle_.is_valid(); }
-
- protected:
-  PlatformChannel();
-
-  PlatformChannelHandle* mutable_handle() { return &handle_; }
-
- private:
-  PlatformChannelHandle handle_;
-
-  DISALLOW_COPY_AND_ASSIGN(PlatformChannel);
-};
+class PlatformChannel;
 
 // This is used to create a pair of connected |PlatformChannel|s. The resulting
 // channels can then be used in the same process (e.g., in tests) or between
@@ -97,4 +74,4 @@ class MOJO_SYSTEM_IMPL_EXPORT PlatformChannelPair {
 }  // namespace system
 }  // namespace mojo
 
-#endif  // MOJO_SYSTEM_PLATFORM_CHANNEL_H_
+#endif  // MOJO_SYSTEM_PLATFORM_CHANNEL_PAIR_H_