Enforce that only one constrained window is displayed at once per tab.

chrome/browser/tab_contents/tab_contents.h

 // 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.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 
 #include "build/build_config.h"
 
+#include <deque>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "app/gfx/native_widget_types.h"
 #include "base/basictypes.h"
 #include "base/gfx/rect.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
@@ skipping 316 matching lines @@
 
   // Shows the page info.
   void ShowPageInfo(const GURL& url,
                     const NavigationEntry::SSLStatus& ssl,
                     bool show_history);
 
   // Window management ---------------------------------------------------------
 
   // Create a new window constrained to this TabContents' clip and visibility.
   // The window is initialized by using the supplied delegate to obtain basic
-  // window characteristics, and the supplied view for the content. The window
-  // is sized according to the preferred size of the content_view, and centered
-  // within the contents.
+  // window characteristics, and the supplied view for the content. Note that
+  // the returned ConstrainedWindow might not yet be visible.
   ConstrainedWindow* CreateConstrainedDialog(
       ConstrainedWindowDelegate* delegate);
 
   // Adds a new tab or window with the given already-created contents
   void AddNewContents(TabContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_pos,
                       bool user_gesture,
                       const GURL& creator_url);
 
   // Closes all constrained windows that represent web popups that have not yet
   // been activated by the user and are as such auto-positioned in the bottom
   // right of the screen. This is a quick way for users to "clean up" a flurry
   // of unwanted popups.
   void CloseAllSuppressedPopups();
 
   // Execute code in this tab.
   void ExecuteCode(int request_id, const std::string& extension_id,
                    bool is_js_code, const std::string& code_string);
 
   // Called when the blocked popup notification is shown or hidden.
   virtual void PopupNotificationVisibilityChanged(bool visible);
 
   // Returns the number of constrained windows in this tab.  Used by tests.
   size_t constrained_window_count() { return child_windows_.size(); }
 
-  typedef std::vector<ConstrainedWindow*> ConstrainedWindowList;
+  typedef std::deque<ConstrainedWindow*> ConstrainedWindowList;
 
   // Return an iterator for the first constrained window in this tab contents.
   ConstrainedWindowList::iterator constrained_window_begin()
   { return child_windows_.begin(); }
 
   // Return an iterator for the last constrained window in this tab contents.
   ConstrainedWindowList::iterator constrained_window_end()
   { return child_windows_.end(); }
 
   // Views and focus -----------------------------------------------------------
@@ skipping 792 matching lines @@
 
   // The time that we started to close the tab.
   base::TimeTicks tab_close_start_time_;
 
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_