Remove IOObservers from MessageLoopForIO.

base/message_loop/message_pump_io_ios.h

 // Copyright 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 BASE_MESSAGE_LOOP_MESSAGE_PUMP_IO_IOS_H_
 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_IO_IOS_H_
 
 #include "base/base_export.h"
 #include "base/mac/scoped_cffiledescriptorref.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_pump_mac.h"
-#include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
 
 namespace base {
 
 // This file introduces a class to monitor sockets and issue callbacks when
 // sockets are ready for I/O on iOS.
 class BASE_EXPORT MessagePumpIOSForIO : public MessagePumpNSRunLoop {
  public:
-  class IOObserver {
-   public:
-    IOObserver() {}
-
-    // An IOObserver is an object that receives IO notifications from the
-    // MessagePump.
-    //
-    // NOTE: An IOObserver implementation should be extremely fast!
-    virtual void WillProcessIOEvent() = 0;
-    virtual void DidProcessIOEvent() = 0;
-
-   protected:
-    virtual ~IOObserver() {}
-  };
-
   // Used with WatchFileDescriptor to asynchronously monitor the I/O readiness
   // of a file descriptor.
   class Watcher {
    public:
     // Called from MessageLoop::Run when an FD can be read from/written to
     // without blocking
     virtual void OnFileCanReadWithoutBlocking(int fd) = 0;
     virtual void OnFileCanWriteWithoutBlocking(int fd) = 0;
 
    protected:
@@ skipping 63 matching lines @@
   // Returns true on success.
   // Must be called on the same thread the message_pump is running on.
   bool WatchFileDescriptor(int fd,
                            bool persistent,
                            int mode,
                            FileDescriptorWatcher *controller,
                            Watcher *delegate);
 
   void RemoveRunLoopSource(CFRunLoopSourceRef source);
 
-  void AddIOObserver(IOObserver* obs);
-  void RemoveIOObserver(IOObserver* obs);
-
  private:
   friend class MessagePumpIOSForIOTest;
 
   void WillProcessIOEvent();
   void DidProcessIOEvent();
 
   static void HandleFdIOEvent(CFFileDescriptorRef fdref,
                               CFOptionFlags callback_types,
                               void* context);
 
-  ObserverList<IOObserver> io_observers_;
   ThreadChecker watch_file_descriptor_caller_checker_;
 
   base::WeakPtrFactory<MessagePumpIOSForIO> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpIOSForIO);
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_PUMP_IO_IOS_H_