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

mojo/edk/system/data_pipe_impl.h

 // Copyright 2015 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_DATA_PIPE_IMPL_H_
 #define MOJO_EDK_SYSTEM_DATA_PIPE_IMPL_H_
 
 #include <stdint.h>
 
 #include <utility>
@@ skipping 126 matching lines @@
     return owner_->validated_options();
   }
   size_t element_num_bytes() const { return owner_->element_num_bytes(); }
   size_t capacity_num_bytes() const { return owner_->capacity_num_bytes(); }
   bool producer_open() const MOJO_NO_THREAD_SAFETY_ANALYSIS {
     return owner_->producer_open_no_lock();
   }
   bool consumer_open() const MOJO_NO_THREAD_SAFETY_ANALYSIS {
     return owner_->consumer_open_no_lock();
   }
+  size_t producer_write_threshold_num_bytes() const
+      MOJO_NO_THREAD_SAFETY_ANALYSIS {
+    return owner_->producer_write_threshold_num_bytes_no_lock();
+  }
   size_t consumer_read_threshold_num_bytes() const
       MOJO_NO_THREAD_SAFETY_ANALYSIS {
     return owner_->consumer_read_threshold_num_bytes_no_lock();
   }
   uint32_t producer_two_phase_max_num_bytes_written() const
       MOJO_NO_THREAD_SAFETY_ANALYSIS {
     return owner_->producer_two_phase_max_num_bytes_written_no_lock();
   }
   uint32_t consumer_two_phase_max_num_bytes_read() const
       MOJO_NO_THREAD_SAFETY_ANALYSIS {
@@ skipping 40 matching lines @@
 struct MOJO_ALIGNAS(8) SerializedDataPipeConsumerDispatcher {
   // Only validated (and thus canonicalized) options should be serialized.
   // However, the deserializer must revalidate (as with everything received).
   MojoCreateDataPipeOptions validated_options;
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_DATA_PIPE_IMPL_H_