ozone: Remove the libevent message-pump.

base/message_loop/message_loop.h

Index: base/message_loop/message_loop.h
diff --git a/base/message_loop/message_loop.h b/base/message_loop/message_loop.h
index e52963f2533058e9e08d258c98a12a78fe98d6e6..7222df7a036524128fbe17808c4092738eefd1f2 100644
--- a/base/message_loop/message_loop.h
+++ b/base/message_loop/message_loop.h
@@ -36,8 +36,6 @@
 
 #if defined(USE_AURA) && defined(USE_X11) && !defined(OS_NACL)
 #include "base/message_loop/message_pump_x11.h"
-#elif defined(USE_OZONE) && !defined(OS_NACL)
-#include "base/message_loop/message_pump_ozone.h"
 #elif !defined(OS_ANDROID_HOST)
 #define USE_GTK_MESSAGE_PUMP
 #include "base/message_loop/message_pump_gtk.h"
@@ -579,7 +577,7 @@ class BASE_EXPORT MessageLoopForUI : public MessageLoop {
   void Start();
 #endif
 
-#if !defined(OS_NACL) && (defined(TOOLKIT_GTK) || defined(USE_OZONE) || \
+#if !defined(OS_NACL) && (defined(TOOLKIT_GTK) || \
                           defined(OS_WIN) || defined(USE_X11))
   // Please see message_pump_win/message_pump_glib for definitions of these
   // methods.
@@ -587,13 +585,20 @@ class BASE_EXPORT MessageLoopForUI : public MessageLoop {
   void RemoveObserver(Observer* observer);
 #endif
 
+#if defined(USE_OZONE)
+  // Please see MessagePumpLibevent for definition.
+  bool WatchFileDescriptor(
+      int fd,
+      bool persistent,
+      MessagePumpLibevent::Mode mode,
+      MessagePumpLibevent::FileDescriptorWatcher* controller,
+      MessagePumpLibevent::Watcher* delegate);
+#endif
+
  protected:
 #if defined(USE_X11)
   friend class MessagePumpX11;
 #endif
-#if defined(USE_OZONE) && !defined(OS_NACL)
-  friend class MessagePumpOzone;
-#endif
 
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
   // TODO(rvargas): Make this platform independent.