Implement a mostly working InfoBubble with a shim BookmarkBubble.

chrome/browser/gtk/toolbar_star_toggle_gtk.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/gtk/toolbar_star_toggle_gtk.h"
 
+#include "base/gfx/rect.h"
+#include "chrome/browser/gtk/bookmark_bubble_gtk.h"
 #include "chrome/common/resource_bundle.h"
 #include "grit/theme_resources.h"
 
 ToolbarStarToggleGtk::ToolbarStarToggleGtk()
     : widget_(gtk_button_new()),
       is_starred_(false),
       unstarred_(IDR_STAR, IDR_STAR_P, IDR_STAR_H, IDR_STAR_D),
       starred_(IDR_STARRED, IDR_STARRED_P, IDR_STARRED_H, 0) {
    gtk_widget_set_size_request(widget_.get(),
                               gdk_pixbuf_get_width(unstarred_.pixbufs(0)),
                               gdk_pixbuf_get_height(unstarred_.pixbufs(0)));
 
    gtk_widget_set_app_paintable(widget_.get(), TRUE);
    // We effectively double-buffer by virtue of having only one image...
    gtk_widget_set_double_buffered(widget_.get(), FALSE);
    g_signal_connect(G_OBJECT(widget_.get()), "expose-event",
                     G_CALLBACK(OnExpose), this);
 }
 
 ToolbarStarToggleGtk::~ToolbarStarToggleGtk() {
   widget_.Destroy();
 }
 
+void ToolbarStarToggleGtk::ShowStarBubble(const GURL& url,
+                                          bool newly_bookmarked) {
+  GtkWidget* widget = widget_.get();
+  gint x, y;

[ecattell, 2009/04/30 19:55:37]

Please initialize basic types (like ints)

[Dean McNamee, 2009/05/01 15:01:46]

It is initialized on the next line, do you still think it needs to be set it to
0?

+  gdk_window_get_origin(widget->window, &x, &y);
+  x += widget->allocation.x;
+  y += widget->allocation.y;
+  gint width = widget->allocation.width;
+  gint height = widget->allocation.height;
+
+  BookmarkBubbleGtk::Show(gfx::Rect(x, y, width, height),
+                          NULL,
+                          url,
+                          newly_bookmarked);
+}
+
 void ToolbarStarToggleGtk::SetStarred(bool starred) {
   is_starred_ = starred;
   gtk_widget_queue_draw(widget_.get());
 }
 
 // static
 gboolean ToolbarStarToggleGtk::OnExpose(GtkWidget* widget, GdkEventExpose* e,
                                         ToolbarStarToggleGtk* button) {
   if (button->is_starred_) {
     return button->starred_.OnExpose(widget, e);
   } else {
     return button->unstarred_.OnExpose(widget, e);
   }
 }