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

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 46 matching lines @@
   void set_owner(DataPipe* owner) { owner_ = owner; }
 
   virtual void ProducerClose() = 0;
   // |num_bytes.Get()| will be a nonzero multiple of |element_num_bytes()|.
   virtual 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) = 0;
   virtual MojoResult ProducerBeginWriteData(
       UserPointer<void*> buffer,
-      UserPointer<uint32_t> buffer_num_bytes,
-      uint32_t min_num_bytes_to_write) = 0;
+      UserPointer<uint32_t> buffer_num_bytes) = 0;
   virtual MojoResult ProducerEndWriteData(uint32_t num_bytes_written) = 0;
   // Note: A producer should not be writable during a two-phase write.
   virtual HandleSignalsState ProducerGetHandleSignalsState() const = 0;
   virtual void ProducerStartSerialize(Channel* channel,
                                       size_t* max_size,
                                       size_t* max_platform_handles) = 0;
   virtual bool ProducerEndSerialize(
       Channel* channel,
       void* destination,
       size_t* actual_size,
       embedder::PlatformHandleVector* platform_handles) = 0;
 
   virtual void ConsumerClose() = 0;
   // |num_bytes.Get()| will be a nonzero multiple of |element_num_bytes()|.
   virtual 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) = 0;
   virtual MojoResult ConsumerDiscardData(UserPointer<uint32_t> num_bytes,
                                          uint32_t max_num_bytes_to_discard,
                                          uint32_t min_num_bytes_to_discard) = 0;
   // |num_bytes.Get()| will be a nonzero multiple of |element_num_bytes()|.
   virtual MojoResult ConsumerQueryData(UserPointer<uint32_t> num_bytes) = 0;
   virtual MojoResult ConsumerBeginReadData(
       UserPointer<const void*> buffer,
-      UserPointer<uint32_t> buffer_num_bytes,
-      uint32_t min_num_bytes_to_read) = 0;
+      UserPointer<uint32_t> buffer_num_bytes) = 0;
   virtual MojoResult ConsumerEndReadData(uint32_t num_bytes_read) = 0;
   // Note: A consumer should not be writable during a two-phase read.
   virtual HandleSignalsState ConsumerGetHandleSignalsState() const = 0;
   virtual void ConsumerStartSerialize(Channel* channel,
                                       size_t* max_size,
                                       size_t* max_platform_handles) = 0;
   virtual bool ConsumerEndSerialize(
       Channel* channel,
       void* destination,
       size_t* actual_size,
@@ skipping 87 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_