Adds some debugging code in hopes of figuring out who is removing the...

chrome/browser/views/bookmark_bar_view.cc

 // Copyright (c) 2006-2008 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/views/bookmark_bar_view.h"
 
 #include <limits>
 
 #include "base/string_util.h"
 #include "base/base_drag_source.h"
 #include "chrome/browser/bookmarks/bookmark_context_menu.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/drag_utils.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/metrics/user_metrics.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/tab_contents/page_navigator.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/view_ids.h"
 #include "chrome/browser/views/bookmark_editor_view.h"
 #include "chrome/browser/views/event_utils.h"
+#include "chrome/browser/views/frame/browser_view.h"
 #include "chrome/browser/views/input_window.h"
 #include "chrome/common/gfx/chrome_canvas.h"
 #include "chrome/common/gfx/favicon_size.h"
 #include "chrome/common/gfx/text_elider.h"
 #include "chrome/common/l10n_util.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/os_exchange_data.h"
 #include "chrome/common/page_transition_types.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/pref_service.h"
@@ skipping 824 matching lines @@
                                       height);
   x += other_bookmarked_pref.width() + kButtonPadding;
 }
 
 void BookmarkBarView::DidChangeBounds(const gfx::Rect& previous,
                                       const gfx::Rect& current) {
   Layout();
 }
 
 void BookmarkBarView::ViewHierarchyChanged(bool is_add,
-                                           View* parent, View* child) {
+                                           View* parent,
+                                           View* child) {
+  // See http://code.google.com/p/chromium/issues/detail?id=7857 . It seems
+  // as though the bookmark bar is getting unintentionally removed.
+  DCHECK(child != this || !is_add ||
+         static_cast<BrowserView*>(parent)->is_removing_bookmark_bar());
+
   if (is_add && child == this && height() > 0) {
     // We only layout while parented. When we become parented, if our bounds
     // haven't changed, DidChangeBounds won't get invoked and we won't layout.
     // Therefore we always force a layout when added.
     Layout();
   }
 }
 
 void BookmarkBarView::Paint(ChromeCanvas* canvas) {
   if (IsDetachedStyle()) {
@@ skipping 976 matching lines @@
 }
 
 void BookmarkBarView::StopThrobbing(bool immediate) {
   if (!throbbing_view_)
     return;
 
   // If not immediate, cycle through 2 more complete cycles.
   throbbing_view_->StartThrobbing(immediate ? 0 : 4);
   throbbing_view_ = NULL;
 }