Revert of Mojo C++ bindings: make ipc/ mojom targets to use STL string/vector types

ipc/ipc_channel_mojo.h

 // 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 IPC_IPC_CHANNEL_MOJO_H_
 #define IPC_IPC_CHANNEL_MOJO_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 65 matching lines @@
   Channel::AssociatedInterfaceSupport* GetAssociatedInterfaceSupport() override;
 
 #if defined(OS_POSIX) && !defined(OS_NACL_SFI)
   int GetClientFileDescriptor() const override;
   base::ScopedFD TakeClientFileDescriptor() override;
 #endif  // defined(OS_POSIX) && !defined(OS_NACL_SFI)
 
   // These access protected API of IPC::Message, which has ChannelMojo
   // as a friend class.
   static MojoResult WriteToMessageAttachmentSet(
-      base::Optional<std::vector<mojom::SerializedHandlePtr>> handle_buffer,
+      mojo::Array<mojom::SerializedHandlePtr> handle_buffer,
       Message* message);
   static MojoResult ReadFromMessageAttachmentSet(
       Message* message,
-      base::Optional<std::vector<mojom::SerializedHandlePtr>>* handles);
+      mojo::Array<mojom::SerializedHandlePtr>* handles);
 
   // MojoBootstrapDelegate implementation
   void OnPipesAvailable(mojom::ChannelAssociatedPtr sender,
                         mojom::ChannelAssociatedRequest receiver) override;
 
   // MessagePipeReader::Delegate
   void OnPeerPidReceived() override;
   void OnMessageReceived(const Message& message) override;
   void OnPipeError() override;
   void OnAssociatedInterfaceRequest(
@@ skipping 30 matching lines @@
       associated_interfaces_;
 
   base::WeakPtrFactory<ChannelMojo> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChannelMojo);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_MOJO_H_