Switch PrintViewManager, PrintPreviewMessageHandler to use WebContentsUserData.

chrome/browser/ui/tab_contents/tab_contents.cc

 // Copyright (c) 2012 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/ui/tab_contents/tab_contents.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "chrome/browser/autofill/autocomplete_history_manager.h"
 #include "chrome/browser/autofill/autofill_external_delegate.h"
@@ skipping 168 matching lines @@
       new safe_browsing::SafeBrowsingTabObserver(this));
     webnavigation_observer_.reset(
         new extensions::WebNavigationTabObserver(contents));
 
 #if !defined(OS_ANDROID)
   if (OmniboxSearchHint::IsEnabled(profile()))
     omnibox_search_hint_.reset(new OmniboxSearchHint(this));
 #endif
 
 #if defined(ENABLE_PRINTING)
-  print_view_manager_.reset(new printing::PrintViewManager(this));
-  print_preview_.reset(new printing::PrintPreviewMessageHandler(contents));
+  printing::PrintPreviewMessageHandler::CreateForWebContents(contents);
+  printing::PrintViewManager::CreateForWebContents(contents);

[Scott Byer, 2012/09/18 17:24:40]

Did you intend to reverse the creation order? (Not that it should matter, just
checking).

 #endif
 
   // Start the in-browser thumbnailing if the feature is enabled.
   if (ShouldEnableInBrowserThumbnailing()) {
     thumbnail_generator_.reset(new ThumbnailGenerator);
     thumbnail_generator_->StartThumbnailing(web_contents_.get());
   }
 
   // If this is not an incognito window, setup to handle one-click login.
   // We don't want to check that the profile is already connected at this time
@@ skipping 50 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsObserver overrides
 
 void TabContents::WebContentsDestroyed(WebContents* tab) {
   // Destruction of the WebContents should only be done by us from our
   // destructor. Otherwise it's very likely we (or one of the helpers we own)
   // will attempt to access the WebContents and we'll crash.
   DCHECK(in_destructor_);
 }