Revert of Support early associated interface binding on ChannelMojo

ipc/ipc_channel.h

 // Copyright (c) 2012 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_CHANNEL_H_
 #define IPC_IPC_CHANNEL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 85 matching lines @@
   // Helper interface a Channel may implement to expose support for associated
   // Mojo interfaces.
   class IPC_EXPORT AssociatedInterfaceSupport {
    public:
     using GenericAssociatedInterfaceFactory =
         base::Callback<void(mojo::ScopedInterfaceEndpointHandle)>;
 
     virtual ~AssociatedInterfaceSupport() {}
 
     // Accesses the AssociatedGroup used to associate new interface endpoints
-    // with this Channel. Must be safe to call from any thread.
+    // with this Channel.
     virtual mojo::AssociatedGroup* GetAssociatedGroup() = 0;
 
-    // Adds an interface factory to this channel for interface |name|. Must be
-    // safe to call from any thread.
+    // Adds an interface factory to this channel for interface |name|.
     virtual void AddGenericAssociatedInterface(
         const std::string& name,
         const GenericAssociatedInterfaceFactory& factory) = 0;
 
     // Requests an associated interface from the remote endpoint.
     virtual void GetGenericRemoteAssociatedInterface(
         const std::string& name,
         mojo::ScopedInterfaceEndpointHandle handle) = 0;
 
+    // Sets the TaskRunner on which to support proxied dispatch for associated
+    // interfaces.
+    virtual void SetProxyTaskRunner(
+        scoped_refptr<base::SingleThreadTaskRunner> task_runner) = 0;
+
     // Template helper to add an interface factory to this channel.
     template <typename Interface>
     using AssociatedInterfaceFactory =
         base::Callback<void(mojo::AssociatedInterfaceRequest<Interface>)>;
     template <typename Interface>
     void AddAssociatedInterface(
         const AssociatedInterfaceFactory<Interface>& factory) {
       AddGenericAssociatedInterface(
           Interface::Name_,
           base::Bind(&BindAssociatedInterfaceRequest<Interface>, factory));
@@ skipping 210 matching lines @@
 
 #if defined(OS_POSIX)
 // SocketPair() creates a pair of socket FDs suitable for using with
 // IPC::Channel.
 IPC_EXPORT bool SocketPair(int* fd1, int* fd2);
 #endif
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_H_