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chrome/browser/ui/browser_list.h

 // Copyright (c) 2011 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_UI_BROWSER_LIST_H_
 #define CHROME_BROWSER_UI_BROWSER_LIST_H_
 #pragma once
 
+#include <set>
 #include <vector>
 
 #include "base/observer_list.h"
 #include "chrome/browser/ui/browser.h"
 
 // Stores a list of all Browser objects.
 class BrowserList {
  public:
   typedef std::vector<Browser*> BrowserVector;
   typedef BrowserVector::iterator iterator;
@@ skipping 192 matching lines @@
   TabContentsIterator();
 
   // Returns true if we are past the last Browser.
   bool done() const {
     return cur_ == NULL;
   }
 
   // Returns the Browser instance associated with the current TabContents.
   // Valid as long as !Done()
   Browser* browser() const {
-    return *browser_iterator_;
+    if (browser_iterator_ != BrowserList::end())
+      return *browser_iterator_;
+    return NULL;
   }
 
   // Returns the current TabContents, valid as long as !Done()
   TabContentsWrapper* operator->() const {
     return cur_;
   }
   TabContentsWrapper* operator*() const {
     return cur_;
   }
 
@@ skipping 13 matching lines @@
   // call when browser_iterator_ points to the first browser and
   // web_view_index_ is -1, it will fill the first host.
   void Advance();
 
   // iterator over all the Browser objects
   BrowserList::const_iterator browser_iterator_;
 
   // tab index into the current Browser of the current web view
   int web_view_index_;
 
+  // iterator over the TabContentsWrappers doing background printing.
+  std::set<TabContentsWrapper*>::const_iterator bg_printing_iterator_;
+
   // Current TabContents, or NULL if we're at the end of the list. This can
   // be extracted given the browser iterator and index, but it's nice to cache
   // this since the caller may access the current host many times.
   TabContentsWrapper* cur_;
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_LIST_H_