Use customized RGBA-enabled tooltip window for tooltip on ChroemOS

chrome/browser/renderer_host/render_widget_host_view_gtk.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_RENDER_WIDGET_HOST_VIEW_GTK_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_
 
 #include <gdk/gdk.h>
 
 #include <map>
 #include <vector>
 #include <string>
 
 #include "base/scoped_ptr.h"
 #include "base/time.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/common/owned_widget_gtk.h"
 #include "gfx/native_widget_types.h"
 #include "webkit/glue/plugins/gtk_plugin_container_manager.h"
 #include "webkit/glue/webcursor.h"
 
 class RenderWidgetHost;
 class GpuViewHost;
 class GtkIMContextWrapper;
 class GtkKeyBindingsHandler;
 class MenuGtk;
 struct NativeWebKeyboardEvent;
 
+#if defined(OS_CHROMEOS)
+namespace views {
+class TooltipWindowGtk;
+}
+#endif  // defined(OS_CHROMEOS)
+
 typedef struct _GtkClipboard GtkClipboard;
 typedef struct _GtkSelectionData GtkSelectionData;
 
 // -----------------------------------------------------------------------------
 // See comments in render_widget_host_view.h about this class and its members.
 // -----------------------------------------------------------------------------
 class RenderWidgetHostViewGtk : public RenderWidgetHostView {
  public:
   explicit RenderWidgetHostViewGtk(RenderWidgetHost* widget);
   ~RenderWidgetHostViewGtk();
@@ skipping 133 matching lines @@
   // A convenience object for handling editor key bindings defined in gtk
   // keyboard theme.
   scoped_ptr<GtkKeyBindingsHandler> key_bindings_handler_;
 
   // Helper class that lets us allocate plugin containers and move them.
   GtkPluginContainerManager plugin_container_manager_;
 
   // The size that we want the renderer to be.  We keep this in a separate
   // variable because resizing in GTK+ is async.
   gfx::Size requested_size_;
+
+#if defined(OS_CHROMEOS)
+  // Custimized tooltip window.
+  scoped_ptr<views::TooltipWindowGtk> tooltip_window_;
+#endif  // defined(OS_CHROMEOS)
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_