Making the Mojo Channel Messages legacy mode dynamic.

mojo/edk/embedder/embedder.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_EDK_EMBEDDER_EMBEDDER_H_
 #define MOJO_EDK_EMBEDDER_EMBEDDER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 56 matching lines @@
 
 // Must be called first, or just after setting configuration parameters, to
 // initialize the (global, singleton) system.
 MOJO_SYSTEM_IMPL_EXPORT void Init();
 
 // Sets a default callback to invoke when an internal error is reported but
 // cannot be associated with a specific child process.
 MOJO_SYSTEM_IMPL_EXPORT void SetDefaultProcessErrorCallback(
     const ProcessErrorCallback& callback);
 
+// Used to select whether mojo:edk::Channel should use the legacy or normal
+// header.
+// TODO(jcivelli): http://crbug.com/695645 remove this when legacy mode is not
+//                 in use anymore.
+MOJO_SYSTEM_IMPL_EXPORT void SetUseLegacyTransportProtocol(
+    bool use_legacy_protocol);
+
 // Basic functions -------------------------------------------------------------
 
 // The functions in this section are available once |Init()| has been called.
 
 // Creates a |MojoHandle| that wraps the given |PlatformHandle| (taking
 // ownership of it). This |MojoHandle| can then, e.g., be passed through message
 // pipes. Note: This takes ownership (and thus closes) |platform_handle| even on
 // failure, which is different from what you'd expect from a Mojo API, but it
 // makes for a more convenient embedder API.
 MOJO_SYSTEM_IMPL_EXPORT MojoResult
@@ skipping 77 matching lines @@
 //
 // Default property values:
 //   |MOJO_PROPERTY_TYPE_SYNC_CALL_ALLOWED| - true
 MOJO_SYSTEM_IMPL_EXPORT MojoResult SetProperty(MojoPropertyType type,
                                                const void* value);
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_EMBEDDER_EMBEDDER_H_