Move more Mojo bindings helpers out of internal namespace

mojo/public/cpp/bindings/message.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 MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <limits>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "mojo/public/cpp/bindings/lib/message_buffer.h"
 #include "mojo/public/cpp/bindings/lib/message_internal.h"
 #include "mojo/public/cpp/system/message.h"
 
 namespace mojo {
 
 // Message is a holder for the data and handles to be sent over a MessagePipe.
 // Message owns its data and handles, but a consumer of Message is free to
 // mutate the data and handles. The message's data is comprised of a header
 // followed by payload.
 class Message {
  public:
+  static const uint32_t kFlagExpectsResponse = 1 << 0;
+  static const uint32_t kFlagIsResponse = 1 << 1;
+  static const uint32_t kFlagIsSync = 1 << 2;
+
   Message();
   ~Message();
 
   // Initializes a Message with enough space for |capacity| bytes.
   void Initialize(size_t capacity, bool zero_initialized);
 
   // Initializes a Message from an existing Mojo MessageHandle.
   void InitializeFromMojoMessage(ScopedMessageHandle message,
                                  uint32_t num_bytes,
                                  std::vector<Handle>* handles);
@@ skipping 148 matching lines @@
 // the caller should wait on the handle to become readable. Returns
 // MOJO_RESULT_OK if the message was read successfully and should be
 // dispatched, otherwise returns an error code if something went wrong.
 //
 // NOTE: The message hasn't been validated and may be malformed!
 MojoResult ReadMessage(MessagePipeHandle handle, Message* message);
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_MESSAGE_H_