[Linux] Workaround issue 45478: IME dysfunctional after BACKSPACE

chrome/browser/renderer_host/gtk_im_context_wrapper.h

 // Copyright (c) 2010 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 CHROME_BROWSER_RENDERER_HOST_GTK_IM_CONTEXT_WRAPPER_H_
 #define CHROME_BROWSER_RENDERER_HOST_GTK_IM_CONTEXT_WRAPPER_H_
 #pragma once
 
 #include <gdk/gdk.h>
 #include <pango/pango-attributes.h>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/string16.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCompositionUnderline.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebInputEvent.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebTextInputType.h"
 
 namespace gfx {
 class Rect;
 }
 
 #if !defined(TOOLKIT_VIEWS)
 class MenuGtk;
 #endif
 class RenderWidgetHostViewGtk;
@@ skipping 66 matching lines @@
   void HandlePreeditEnd();
 
   // Real code of "realize" signal handler, used for setting im context's client
   // window.
   void HandleHostViewRealize(GtkWidget* widget);
 
   // Real code of "unrealize" signal handler, used for unsetting im context's
   // client window.
   void HandleHostViewUnrealize();
 
+  // Sends a fake composition key event with specified event type. A composition
+  // key event is a key event with special key code 229.
+  void SendFakeCompositionKeyEvent(WebKit::WebInputEvent::Type type);
+
   // Signal handlers of GtkIMContext object.
   static void HandleCommitThunk(GtkIMContext* context, gchar* text,
                                 GtkIMContextWrapper* self);
   static void HandlePreeditStartThunk(GtkIMContext* context,
                                       GtkIMContextWrapper* self);
   static void HandlePreeditChangedThunk(GtkIMContext* context,
                                         GtkIMContextWrapper* self);
   static void HandlePreeditEndThunk(GtkIMContext* context,
                                     GtkIMContextWrapper* self);
 
@@ skipping 85 matching lines @@
 
   // If it's true then the next "commit" signal will be suppressed.
   // It's only used to workaround http://crbug.com/50485.
   // TODO(suzhe): Remove it after input methods get fixed.
   bool suppress_next_commit_;
 
   DISALLOW_COPY_AND_ASSIGN(GtkIMContextWrapper);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_GTK_IM_CONTEXT_WRAPPER_H_