Don't create new tabs for middle clicks on bookmark items when the user relea...

chrome/browser/gtk/bookmark_bar_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/bookmark_bar_gtk.h"
 
 #include <vector>
 
 #include "app/gfx/text_elider.h"
 #include "app/l10n_util.h"
@@ skipping 540 matching lines @@
 // static
 gboolean BookmarkBarGtk::OnButtonReleased(GtkWidget* sender,
                                           GdkEventButton* event,
                                           BookmarkBarGtk* bar) {
   if (bar->ignore_button_release_) {
     // Don't handle this message; it was a drag.
     bar->ignore_button_release_ = false;
     return FALSE;
   }
 
+  // Don't take any action if the user releases outside the button.
+  if (event->x < 0 || event->y < 0 || event->x >= sender->allocation.width ||
+      event->y >= sender->allocation.height) {
+    return FALSE;
+  }
+
   const BookmarkNode* node = bar->GetNodeForToolButton(sender);
   DCHECK(node);
   DCHECK(bar->page_navigator_);
 
   if (node->is_url()) {
     bar->page_navigator_->OpenURL(
         node->GetURL(), GURL(),
         event_utils::DispositionFromEventFlags(event->state),
         PageTransition::AUTO_BOOKMARK);
   } else {
@@ skipping 261 matching lines @@
   bar->InitBackground();
   gfx::Point tabstrip_origin =
       bar->window_->tabstrip()->GetTabStripOriginForWidget(widget);
   bar->background_ninebox_->RenderTopCenterStrip(
       cr, tabstrip_origin.x(), tabstrip_origin.y(),
       event->area.x + event->area.width - tabstrip_origin.x());
   cairo_destroy(cr);
 
   return FALSE;  // Propagate expose to children.
 }