Revert of Remove IPC::BrokerableAttachment.

ipc/ipc_channel_reader_unittest.cc

 // 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.
 
 #include "build/build_config.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <limits>
 #include <memory>
 #include <set>
 
 #include "base/run_loop.h"
+#include "ipc/brokerable_attachment.h"
 #include "ipc/ipc_channel_reader.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace IPC {
 namespace internal {
 
 namespace {
 
 class MockChannelReader : public ChannelReader {
  public:
   MockChannelReader()
       : ChannelReader(nullptr), last_dispatched_message_(nullptr) {}
 
   ReadState ReadData(char* buffer, int buffer_len, int* bytes_read) override {
     if (data_.empty())
       return READ_PENDING;
 
     size_t read_len = std::min(static_cast<size_t>(buffer_len), data_.size());
     memcpy(buffer, data_.data(), read_len);
     *bytes_read = static_cast<int>(read_len);
     data_.erase(0, read_len);
     return READ_SUCCEEDED;
   }
 
   bool ShouldDispatchInputMessage(Message* msg) override { return true; }
 
-  bool GetAttachments(Message* msg) override { return true; }
+  bool GetNonBrokeredAttachments(Message* msg) override { return true; }
 
   bool DidEmptyInputBuffers() override { return true; }
 
   void HandleInternalMessage(const Message& msg) override {}
 
   void DispatchMessage(Message* m) override { last_dispatched_message_ = m; }
 
   Message* get_last_dispatched_message() { return last_dispatched_message_; }
 
   void AppendData(const void* data, size_t size) {
@@ skipping 188 matching lines @@
               reader.ProcessIncomingMessages());
 
     // We determined message size for the second (partial) message, so
     // we resized the buffer to fit.
     EXPECT_GE(reader.input_overflow_buf_.capacity(), message2.size());
   }
 }
 
 }  // namespace internal
 }  // namespace IPC