Support early associated interface binding on ChannelMojo

ipc/ipc_mojo_bootstrap.h

 // Copyright 2014 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_IPC_MOJO_BOOTSTRAP_H_
 #define IPC_IPC_MOJO_BOOTSTRAP_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/process/process_handle.h"
 #include "base/single_thread_task_runner.h"
 #include "build/build_config.h"
 #include "ipc/ipc.mojom.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_listener.h"
 #include "mojo/public/cpp/bindings/associated_group.h"
 #include "mojo/public/cpp/system/message_pipe.h"
 
 namespace IPC {
 
 // MojoBootstrap establishes a pair of associated interfaces between two
 // processes in Chrome.
 //
 // Clients should implement MojoBootstrap::Delegate to get the associated pipes
 // from MojoBootstrap object.
 //
 // This lives on IO thread other than Create(), which can be called from
 // UI thread as Channel::Create() can be.
 class IPC_EXPORT MojoBootstrap {
  public:
   class Delegate {
    public:
-    virtual void OnPipesAvailable(
-        mojom::ChannelAssociatedPtrInfo send_channel,
-        mojom::ChannelAssociatedRequest receive_channel,
-        int32_t peer_pid) = 0;
-    virtual void OnBootstrapError() = 0;
+    virtual ~Delegate() {}
+
+    virtual void OnPipesAvailable(mojom::ChannelAssociatedPtr sender,
+                                  mojom::ChannelAssociatedRequest receiver) = 0;
   };
 
+  virtual ~MojoBootstrap() {}
+
   // Create the MojoBootstrap instance, using |handle| as the message pipe, in
   // mode as specified by |mode|. The result is passed to |delegate|.
   static std::unique_ptr<MojoBootstrap> Create(
       mojo::ScopedMessagePipeHandle handle,
       Channel::Mode mode,
-      Delegate* delegate);
-
-  MojoBootstrap();
-  virtual ~MojoBootstrap();
+      Delegate* delegate,
+      const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner);
 
   // Start the handshake over the underlying message pipe.
   virtual void Connect() = 0;
 
   virtual mojo::AssociatedGroup* GetAssociatedGroup() = 0;
-
-  virtual void SetProxyTaskRunner(
-      scoped_refptr<base::SingleThreadTaskRunner> task_runner) = 0;
-
-  // GetSelfPID returns our PID.
-  base::ProcessId GetSelfPID() const;
-
- protected:
-  // On MojoServerBootstrap: INITIALIZED -> WAITING_ACK -> READY
-  // On MojoClientBootstrap: INITIALIZED -> READY
-  // STATE_ERROR is a catch-all state that captures any observed error.
-  enum State { STATE_INITIALIZED, STATE_WAITING_ACK, STATE_READY, STATE_ERROR };
-
-  Delegate* delegate() const { return delegate_; }
-  void Fail();
-  bool HasFailed() const;
-
-  State state() const { return state_; }
-  void set_state(State state) { state_ = state; }
-
-  mojo::ScopedMessagePipeHandle TakeHandle();
-
- private:
-  void Init(mojo::ScopedMessagePipeHandle, Delegate* delegate);
-
-  mojo::ScopedMessagePipeHandle handle_;
-  Delegate* delegate_;
-  State state_;
-
-  DISALLOW_COPY_AND_ASSIGN(MojoBootstrap);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MOJO_BOOTSTRAP_H_