Fix bug of input.ime.onKeyEvent on Linux.

ui/base/ime/input_method_auralinux.h

Index: ui/base/ime/input_method_auralinux.h
diff --git a/ui/base/ime/input_method_auralinux.h b/ui/base/ime/input_method_auralinux.h
index 7436ceab801755bfe4ca657df00fe1dcfb70f4c6..732d4340189cc05035c8e994c9b57b88ee04ecf4 100644
--- a/ui/base/ime/input_method_auralinux.h
+++ b/ui/base/ime/input_method_auralinux.h
@@ -57,9 +57,22 @@ class UI_BASE_IME_EXPORT InputMethodAuraLinux
   void UpdateContextFocusState();
   void ResetContext();
 
-  // Callback function for IMEEngineHandlerInterface::ProcessKeyEvent.
+  // Processes the key event after the event is processed by the system IME or
+  // the extension.
   void ProcessKeyEventDone(ui::KeyEvent* event, bool filtered, bool is_handled);
 
+  // Callback function for IMEEngineHandlerInterface::ProcessKeyEvent().
+  // It recovers the context when the event is being passed to the extension and
+  // call ProcessKeyEventDone() for the following processing. This is necessary
+  // as this method is async. The environment may be changed by other generated
+  // key events by the time the callback is run.
+  void ProcessKeyEventByEngineDone(ui::KeyEvent* event,
+                                   bool filtered,
+                                   bool composition_changed,
+                                   ui::CompositionText* composition,
+                                   base::string16* result_text,
+                                   bool is_handled);
+
   scoped_ptr<LinuxInputMethodContext> context_;
   scoped_ptr<LinuxInputMethodContext> context_simple_;