Mojo: add support for disallowing sync calls for a process.

mojo/public/c/system/thunks.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.
 
 // Note: This header should be compilable as C.
 
 #ifndef MOJO_PUBLIC_C_SYSTEM_THUNKS_H_
 #define MOJO_PUBLIC_C_SYSTEM_THUNKS_H_
 
 #include <stddef.h>
@@ skipping 138 matching lines @@
       MojoPlatformSharedBufferHandleFlags flags,
       MojoHandle* mojo_handle);
   MojoResult (*UnwrapPlatformSharedBufferHandle)(
       MojoHandle mojo_handle,
       struct MojoPlatformHandle* platform_handle,
       size_t* num_bytes,
       MojoPlatformSharedBufferHandleFlags* flags);
   MojoResult (*NotifyBadMessage)(MojoMessageHandle message,
                                  const char* error,
                                  size_t error_num_bytes);
+  MojoResult (*GetProperty)(MojoPropertyType type, void* value);
 };
 #pragma pack(pop)
 
 // Use this type for the function found by dynamically discovering it in
 // a DSO linked with mojo_system. For example:
 // MojoSetSystemThunksFn mojo_set_system_thunks_fn =
 //     reinterpret_cast<MojoSetSystemThunksFn>(app_library.GetFunctionPointer(
 //         "MojoSetSystemThunks"));
 // The expected size of |system_thunks| is returned.
 // The contents of |system_thunks| are copied.
 typedef size_t (*MojoSetSystemThunksFn)(
     const struct MojoSystemThunks* system_thunks);
 
 // A function for setting up the embedder's own system thunks. This should only
 // be called by Mojo embedder code.
 MOJO_SYSTEM_EXPORT size_t MojoEmbedderSetSystemThunks(
     const struct MojoSystemThunks* system_thunks);
 
 #endif  // MOJO_PUBLIC_C_SYSTEM_THUNKS_H_