Trigger repaint on first paint only on pending stylesheet decrement.

third_party/WebKit/Source/core/loader/HttpEquiv.cpp

 // Copyright 2015 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 "core/loader/HttpEquiv.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/StyleEngine.h"
 #include "core/fetch/ClientHintsPreferences.h"
 #include "core/frame/UseCounter.h"
@@ skipping 56 matching lines @@
 void HttpEquiv::processHttpEquivDefaultStyle(Document& document, const AtomicString& content)
 {
     // The preferred style set has been overridden as per section
     // 14.3.2 of the HTML4.0 specification. We need to update the
     // sheet used variable and then update our style selector.
     // For more info, see the test at:
     // http://www.hixie.ch/tests/evil/css/import/main/preferred.html
     // -dwh
     document.styleEngine().setSelectedStylesheetSetName(content);
     document.styleEngine().setPreferredStylesheetSetName(content);
-    document.styleResolverChanged();
+    document.styleEngine().resolverChanged(FullStyleUpdate);
 }
 
 void HttpEquiv::processHttpEquivRefresh(Document& document, const AtomicString& content)
 {
     document.maybeHandleHttpRefresh(content, Document::HttpRefreshFromMetaTag);
 }
 
 void HttpEquiv::processHttpEquivSetCookie(Document& document, const AtomicString& content)
 {
     // FIXME: make setCookie work on XML documents too; e.g. in case of <html:meta .....>
@@ skipping 22 matching lines @@
     frame->loader().stopAllLoaders();
     // Stopping the loader isn't enough, as we're already parsing the document; to honor the header's
     // intent, we must navigate away from the possibly partially-rendered document to a location that
     // doesn't inherit the parent's SecurityOrigin.
     // TODO(dglazkov): This should probably check document lifecycle instead.
     if (document.frame())
         frame->navigate(document, SecurityOrigin::urlWithUniqueSecurityOrigin(), true, UserGestureStatus::None);
 }
 
 } // namespace blink