Convert WriteData...() to use the new user pointer handling (see r285350).

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 <stdint.h>
 
 #include "base/macros.h"
@@ skipping 32 matching lines @@
   // |MojoCreateDataPipeOptions| and will be entirely overwritten on success (it
   // may be partly overwritten on failure).
   static MojoResult ValidateCreateOptions(
       const MojoCreateDataPipeOptions* in_options,
       MojoCreateDataPipeOptions* out_options);
 
   // These are called by the producer dispatcher to implement its methods of
   // corresponding names.
   void ProducerCancelAllWaiters();
   void ProducerClose();
-  // This does not validate its arguments, except to check that |*num_bytes| is
-  // a multiple of |element_num_bytes_|.
-  MojoResult ProducerWriteData(const void* elements,
-                               uint32_t* num_bytes,
+  MojoResult ProducerWriteData(UserPointer<const void> elements,
+                               UserPointer<uint32_t> num_bytes,
                                bool all_or_none);
   MojoResult ProducerBeginWriteData(UserPointer<void*> buffer,
                                     UserPointer<uint32_t> buffer_num_bytes,
                                     bool all_or_none);
   MojoResult ProducerEndWriteData(uint32_t num_bytes_written);
   MojoResult ProducerAddWaiter(Waiter* waiter,
                                MojoHandleSignals signals,
                                uint32_t context);
   void ProducerRemoveWaiter(Waiter* waiter);
   bool ProducerIsBusy() const;
@@ skipping 22 matching lines @@
 
  protected:
   DataPipe(bool has_local_producer,
            bool has_local_consumer,
            const MojoCreateDataPipeOptions& validated_options);
 
   friend class base::RefCountedThreadSafe<DataPipe>;
   virtual ~DataPipe();
 
   virtual void ProducerCloseImplNoLock() = 0;
-  // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|.
-  virtual MojoResult ProducerWriteDataImplNoLock(const void* elements,
-                                                 uint32_t* num_bytes,
-                                                 bool all_or_none) = 0;
+  // |num_bytes.Get()| will be a nonzero multiple of |element_num_bytes_|.
+  virtual MojoResult ProducerWriteDataImplNoLock(
+      UserPointer<const void> elements,
+      UserPointer<uint32_t> num_bytes,
+      uint32_t max_num_bytes_to_write,
+      uint32_t min_num_bytes_to_write) = 0;
   virtual MojoResult ProducerBeginWriteDataImplNoLock(
       UserPointer<void*> buffer,
       UserPointer<uint32_t> buffer_num_bytes,
       uint32_t min_num_bytes_to_write) = 0;
   virtual MojoResult ProducerEndWriteDataImplNoLock(
       uint32_t num_bytes_written) = 0;
   // Note: A producer should not be writable during a two-phase write.
   virtual HandleSignalsState ProducerGetHandleSignalsStateNoLock() const = 0;
 
   virtual void ConsumerCloseImplNoLock() = 0;
@@ skipping 88 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_