Delete IPC::ChannelPosix, IPC::ChannelWin and IPC::AttachmentBroker.

ipc/brokerable_attachment.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 IPC_BROKERABLE_ATTACHMENT_H_
 #define IPC_BROKERABLE_ATTACHMENT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "ipc/ipc_export.h"
 #include "ipc/ipc_message_attachment.h"
 
 namespace IPC {
 
 // This subclass of MessageAttachment requires an AttachmentBroker to be
 // attached to a Chrome IPC message.
 class IPC_EXPORT BrokerableAttachment : public MessageAttachment {
  public:
-  static const size_t kNonceSize = 16;
-  // An id uniquely identifies an attachment sent via a broker.
-  struct IPC_EXPORT AttachmentId {
-    uint8_t nonce[kNonceSize];
-
-    // Generates an AttachmentId with an unguessable, random nonce.
-    static AttachmentId CreateIdWithRandomNonce();
-
-    // Creates an AttachmentId with a zeroed nonce. This should only be used by
-    // the IPC translation system, which requires that classes have a default
-    // constructor.
-    AttachmentId();
-
-    // Constructs an AttachmentId from a buffer.
-    AttachmentId(const char* start_address, size_t size);
-
-    // Writes the nonce into a buffer.
-    void SerializeToBuffer(char* start_address, size_t size);
-
-    bool operator==(const AttachmentId& rhs) const {
-      return std::equal(nonce, nonce + kNonceSize, rhs.nonce);
-    }
-
-    bool operator<(const AttachmentId& rhs) const {
-      return std::lexicographical_compare(nonce, nonce + kNonceSize, rhs.nonce,
-                                          rhs.nonce + kNonceSize);
-    }
-  };
-
   enum BrokerableType {
     PLACEHOLDER,
     WIN_HANDLE,
     MACH_PORT,
   };
 
-  // The identifier is unique across all Chrome processes.
-  AttachmentId GetIdentifier() const;
-
   // Whether the attachment still needs information from the broker before it
   // can be used.
   bool NeedsBrokering() const;
 
   // Returns TYPE_BROKERABLE_ATTACHMENT
   Type GetType() const override;
 
   virtual BrokerableType GetBrokerableType() const = 0;
 
 // MessageAttachment override.
 #if defined(OS_POSIX)
   base::PlatformFile TakePlatformFile() override;
 #endif  // OS_POSIX
 
  protected:
   BrokerableAttachment();
-  BrokerableAttachment(const AttachmentId& id);
   ~BrokerableAttachment() override;
 
  private:
-  // This member uniquely identifies a BrokerableAttachment across all Chrome
-  // processes.
-  const AttachmentId id_;
-
   DISALLOW_COPY_AND_ASSIGN(BrokerableAttachment);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_BROKERABLE_ATTACHMENT_H_