Support PDF print preview in ChromeFrame by opening the preview in a new Chrome popup window.

chrome/browser/printing/print_preview_tab_controller.cc

 // 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.
 
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
@@ skipping 152 matching lines @@
   PrintPreviewTabMap::iterator it = preview_tab_map_.find(preview_tab);
   if (it != preview_tab_map_.end())
     return preview_tab_map_[preview_tab];
   return NULL;
 }
 
 TabContents* PrintPreviewTabController::CreatePrintPreviewTab(
     TabContents* initiator_tab) {
   Browser* current_browser = BrowserList::FindBrowserWithID(
       initiator_tab->controller().window_id().id());
-  if (!current_browser)
-    return NULL;
+  if (!current_browser) {
+    if (initiator_tab->delegate()->IsExternalTabContainer()) {
+      current_browser = Browser::CreateForType(Browser::TYPE_POPUP,
+                                               initiator_tab->profile());
+      if (!current_browser) {
+        NOTREACHED() << "Failed to create popup browser window";
+        return NULL;
+      }
+    } else {
+      return NULL;
+    }
+  }
 
   // Add a new tab next to initiator tab.
   browser::NavigateParams params(current_browser,
                                  GURL(chrome::kChromeUIPrintURL),
                                  PageTransition::LINK);
   params.disposition = NEW_FOREGROUND_TAB;
+  if (initiator_tab->delegate()->IsExternalTabContainer())
+    params.disposition = NEW_POPUP;
   params.tabstrip_index = current_browser->tabstrip_model()->
       GetWrapperIndex(initiator_tab) + 1;
   browser::Navigate(&params);
   TabContentsWrapper* preview_tab = params.target_contents;
   preview_tab->tab_contents()->Activate();
 
   // Add an entry to the map.
   preview_tab_map_[preview_tab->tab_contents()] = initiator_tab;
   waiting_for_new_preview_page_ = true;
 
@@ skipping 11 matching lines @@
 }
 
 void PrintPreviewTabController::RemoveObservers(TabContents* tab) {
   registrar_.Remove(this, NotificationType::TAB_CONTENTS_DESTROYED,
                     Source<TabContents>(tab));
   registrar_.Remove(this, NotificationType::NAV_ENTRY_COMMITTED,
                     Source<NavigationController>(&tab->controller()));
 }
 
 }  // namespace printing