Cleanup: Remove internal two-phase data pipe all-or-none support.

mojo/edk/system/local_data_pipe_impl.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_LOCAL_DATA_PIPE_IMPL_H_
 #define MOJO_EDK_SYSTEM_LOCAL_DATA_PIPE_IMPL_H_
 
 #include <memory>
 
 #include "base/memory/aligned_memory.h"
@@ skipping 13 matching lines @@
   LocalDataPipeImpl();
   ~LocalDataPipeImpl() override;
 
  private:
   // |DataPipeImpl| implementation:
   void ProducerClose() override;
   MojoResult ProducerWriteData(UserPointer<const void> elements,
                                UserPointer<uint32_t> num_bytes,
                                uint32_t max_num_bytes_to_write,
                                uint32_t min_num_bytes_to_write) override;
-  MojoResult ProducerBeginWriteData(UserPointer<void*> buffer,
-                                    UserPointer<uint32_t> buffer_num_bytes,
-                                    uint32_t min_num_bytes_to_write) override;
+  MojoResult ProducerBeginWriteData(
+      UserPointer<void*> buffer,
+      UserPointer<uint32_t> buffer_num_bytes) override;
   MojoResult ProducerEndWriteData(uint32_t num_bytes_written) override;
   HandleSignalsState ProducerGetHandleSignalsState() const override;
   void ProducerStartSerialize(Channel* channel,
                               size_t* max_size,
                               size_t* max_platform_handles) override;
   bool ProducerEndSerialize(
       Channel* channel,
       void* destination,
       size_t* actual_size,
       embedder::PlatformHandleVector* platform_handles) override;
   void ConsumerClose() override;
   MojoResult ConsumerReadData(UserPointer<void> elements,
                               UserPointer<uint32_t> num_bytes,
                               uint32_t max_num_bytes_to_read,
                               uint32_t min_num_bytes_to_read,
                               bool peek) override;
   MojoResult ConsumerDiscardData(UserPointer<uint32_t> num_bytes,
                                  uint32_t max_num_bytes_to_discard,
                                  uint32_t min_num_bytes_to_discard) override;
   MojoResult ConsumerQueryData(UserPointer<uint32_t> num_bytes) override;
-  MojoResult ConsumerBeginReadData(UserPointer<const void*> buffer,
-                                   UserPointer<uint32_t> buffer_num_bytes,
-                                   uint32_t min_num_bytes_to_read) override;
+  MojoResult ConsumerBeginReadData(
+      UserPointer<const void*> buffer,
+      UserPointer<uint32_t> buffer_num_bytes) override;
   MojoResult ConsumerEndReadData(uint32_t num_bytes_read) override;
   HandleSignalsState ConsumerGetHandleSignalsState() const override;
   void ConsumerStartSerialize(Channel* channel,
                               size_t* max_size,
                               size_t* max_platform_handles) override;
   bool ConsumerEndSerialize(
       Channel* channel,
       void* destination,
       size_t* actual_size,
       embedder::PlatformHandleVector* platform_handles) override;
@@ skipping 17 matching lines @@
   size_t start_index_;
   size_t current_num_bytes_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(LocalDataPipeImpl);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_LOCAL_DATA_PIPE_IMPL_H_