Collect @viewport before constructing RuleSets.

third_party/WebKit/Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All
  * Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 386 matching lines @@
       if (!mainFrame() || !mainFrame()->isLocalFrame())
         break;
       deprecatedLocalMainFrame()
           ->document()
           ->axObjectCacheOwner()
           .clearAXObjectCache();
       break;
     case SettingsDelegate::ViewportRuleChange: {
       if (!mainFrame() || !mainFrame()->isLocalFrame())
         break;
-      Document* doc = toLocalFrame(mainFrame())->document();
-      if (!doc || !doc->styleResolver())
-        break;
-      doc->styleResolver()->viewportStyleResolver()->collectViewportRules();
+      if (Document* doc = toLocalFrame(mainFrame())->document())
+        doc->styleEngine().viewportRulesChanged();
     } break;
     case SettingsDelegate::TextTrackKindUserPreferenceChange:
       for (Frame* frame = mainFrame(); frame;
            frame = frame->tree().traverseNext()) {
         if (frame->isLocalFrame()) {
           Document* doc = toLocalFrame(frame)->document();
           if (doc)
             HTMLMediaElement::setTextTrackKindUserPreferenceForAllMediaElements(
                 doc);
         }
@@ skipping 118 matching lines @@
     : chromeClient(nullptr),
       contextMenuClient(nullptr),
       editorClient(nullptr),
       spellCheckerClient(nullptr) {}
 
 Page::PageClients::~PageClients() {}
 
 template class CORE_TEMPLATE_EXPORT Supplement<Page>;
 
 }  // namespace blink