EDK: Add implementation of data pipe producer write threshold stuff.

mojo/edk/system/core.h

 // Copyright 2013 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_SYSTEM_CORE_H_
 #define MOJO_EDK_SYSTEM_CORE_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 112 matching lines @@
                          UserPointer<MojoHandle> handles,
                          UserPointer<uint32_t> num_handles,
                          MojoReadMessageFlags flags);
 
   // These methods correspond to the API functions defined in
   // "mojo/public/c/system/data_pipe.h":
   MojoResult CreateDataPipe(
       UserPointer<const MojoCreateDataPipeOptions> options,
       UserPointer<MojoHandle> data_pipe_producer_handle,
       UserPointer<MojoHandle> data_pipe_consumer_handle);
+  MojoResult SetDataPipeProducerOptions(
+      MojoHandle data_pipe_producer_handle,
+      UserPointer<const MojoDataPipeProducerOptions> options);
+  MojoResult GetDataPipeProducerOptions(
+      MojoHandle data_pipe_producer_handle,
+      UserPointer<MojoDataPipeProducerOptions> options,
+      uint32_t options_num_bytes);
   MojoResult WriteData(MojoHandle data_pipe_producer_handle,
                        UserPointer<const void> elements,
                        UserPointer<uint32_t> num_bytes,
                        MojoWriteDataFlags flags);
   MojoResult BeginWriteData(MojoHandle data_pipe_producer_handle,
                             UserPointer<void*> buffer,
                             UserPointer<uint32_t> buffer_num_bytes,
                             MojoWriteDataFlags flags);
   MojoResult EndWriteData(MojoHandle data_pipe_producer_handle,
                           uint32_t num_bytes_written);
@@ skipping 59 matching lines @@
   util::Mutex mapping_table_mutex_;
   MappingTable mapping_table_ MOJO_GUARDED_BY(mapping_table_mutex_);
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Core);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CORE_H_