Mojo: Plumb wait flags state through DataPipe::Awake...WaitersForStateChangeNoLock().

mojo/system/data_pipe.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_SYSTEM_DATA_PIPE_H_
 #define MOJO_SYSTEM_DATA_PIPE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 147 matching lines @@
   bool producer_in_two_phase_write_no_lock() const {
     lock_.AssertAcquired();
     return producer_two_phase_max_num_bytes_written_ > 0;
   }
   bool consumer_in_two_phase_read_no_lock() const {
     lock_.AssertAcquired();
     return consumer_two_phase_max_num_bytes_read_ > 0;
   }
 
  private:
-  void AwakeProducerWaitersForStateChangeNoLock();
-  void AwakeConsumerWaitersForStateChangeNoLock();
+  void AwakeProducerWaitersForStateChangeNoLock(
+      const WaitFlagsState& new_producer_state);
+  void AwakeConsumerWaitersForStateChangeNoLock(
+      const WaitFlagsState& new_consumer_state);
 
   bool has_local_producer_no_lock() const {
     lock_.AssertAcquired();
     return !!producer_waiter_list_;
   }
   bool has_local_consumer_no_lock() const {
     lock_.AssertAcquired();
     return !!consumer_waiter_list_;
   }
 
@@ skipping 12 matching lines @@
   uint32_t producer_two_phase_max_num_bytes_written_;
   uint32_t consumer_two_phase_max_num_bytes_read_;
 
   DISALLOW_COPY_AND_ASSIGN(DataPipe);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_DATA_PIPE_H_