Fix bug of input.ime.onKeyEvent on Linux.

ui/base/ime/input_method_auralinux.h

 // Copyright 2013 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 UI_BASE_IME_INPUT_METHOD_AURALINUX_H_
 #define UI_BASE_IME_INPUT_METHOD_AURALINUX_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/ime/composition_text.h"
@@ skipping 39 matching lines @@
                                 TextInputClient* focused) override;
 
  private:
   bool HasInputMethodResult();
   bool NeedInsertChar() const;
   ui::EventDispatchDetails SendFakeProcessKeyEvent(ui::KeyEvent* event) const;
   void ConfirmCompositionText();
   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_;
 
   base::string16 result_text_;
 
   ui::CompositionText composition_;
 
   // The current text input type used to indicates if |context_| and
   // |context_simple_| are focused or not.
   TextInputType text_input_type_;
@@ skipping 11 matching lines @@
 
   // Used for making callbacks.
   base::WeakPtrFactory<InputMethodAuraLinux> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodAuraLinux);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_AURALINUX_H_