Reverting 6911.

chrome/common/ipc_channel_posix.h

Index: chrome/common/ipc_channel_posix.h
===================================================================
--- chrome/common/ipc_channel_posix.h	(revision 6915)
+++ chrome/common/ipc_channel_posix.h	(working copy)
@@ -11,10 +11,11 @@
 #include <string>
 
 #include "base/message_loop.h"
+#include "third_party/libevent/event.h"
 
 namespace IPC {
 
-class Channel::ChannelImpl : public MessageLoopForIO::Watcher {
+class Channel::ChannelImpl : public MessageLoopForIO::FileWatcher {
  public:
   // Mirror methods of Channel, see ipc_channel.h for description.
   ChannelImpl(const std::wstring& channel_id, Mode mode, Listener* listener);
@@ -30,20 +31,28 @@
   bool ProcessIncomingMessages();
   bool ProcessOutgoingMessages();
 
-  void OnFileCanReadWithoutBlocking(int fd);
-  void OnFileCanWriteWithoutBlocking(int fd);
+  void OnFileReadReady(int fd);
+  void OnFileWriteReady(int fd);
 
   Mode mode_;
 
-  // After accepting one client connection on our server socket we want to
-  // stop listening.
-  MessageLoopForIO::FileDescriptorWatcher server_listen_connection_watcher_;
-  MessageLoopForIO::FileDescriptorWatcher read_watcher_;
-  MessageLoopForIO::FileDescriptorWatcher write_watcher_;
+  // Wrapper for Libevent event.
+  // TODO(playmobil): MessageLoopForIO needs to better encapsulate libevent.
+  struct EventHolder {
+  EventHolder() : is_active(false) {}
+  ~EventHolder() {}
 
-  // Are we currently blocked waiting for a write to complete.
-  bool is_blocked_on_write_;
+  bool is_active;
 
+  // libevent's set functions set all the needed members of this struct, so no
+  // need to initialize before use.
+  struct event event;
+  };
+
+  EventHolder *server_listen_connection_event_;
+  EventHolder *read_event_;
+  EventHolder *write_event_;
+
   // If sending a message blocks then we use this variable
   // to keep track of where we are.
   size_t message_send_bytes_written_;