Revert of Collect active stylesheets and and apply asynchronously.

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 42d01f256c5a85a3e908a1d9ac81bc219c6f3fcd..27eb979e482a74ca359dabdff10a03341f592bae 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -30,6 +30,7 @@
 #include "core/MediaTypeNames.h"
 #include "core/animation/DocumentAnimations.h"
 #include "core/css/FontFaceSet.h"
+#include "core/css/resolver/StyleResolver.h"
 #include "core/dom/AXObjectCache.h"
 #include "core/dom/DOMNodeIds.h"
 #include "core/dom/ElementVisibilityObserver.h"
@@ -37,7 +38,6 @@
 #include "core/dom/IntersectionObserverCallback.h"
 #include "core/dom/IntersectionObserverController.h"
 #include "core/dom/IntersectionObserverInit.h"
-#include "core/dom/StyleChangeReason.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/FrameSelection.h"
@@ -1473,10 +1473,6 @@
       setMediaType(m_mediaTypeWhenNotPrinting);
     m_mediaTypeWhenNotPrinting = nullAtom;
   }
-
-  m_frame->document()->setNeedsStyleRecalc(
-      SubtreeStyleChange,
-      StyleChangeReasonForTracing::create(StyleChangeReason::StyleSheetChange));
 }
 
 bool FrameView::contentsInCompositedLayer() const {