No need to re-collect stylesheets for setting type StyleChange.

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

Index: third_party/WebKit/Source/core/page/Page.cpp
diff --git a/third_party/WebKit/Source/core/page/Page.cpp b/third_party/WebKit/Source/core/page/Page.cpp
index 474628f9ed6734da4330551aaf41361cafcb348c..dc6a2a457d56c1e41c8acbbfcf16a81b767d0f54 100644
--- a/third_party/WebKit/Source/core/page/Page.cpp
+++ b/third_party/WebKit/Source/core/page/Page.cpp
@@ -21,6 +21,7 @@
 
 #include "core/css/resolver/ViewportStyleResolver.h"
 #include "core/dom/ClientRectList.h"
+#include "core/dom/StyleChangeReason.h"
 #include "core/dom/VisitedLinkState.h"
 #include "core/editing/DragCaretController.h"
 #include "core/editing/commands/UndoStack.h"
@@ -241,7 +242,7 @@ void Page::setNeedsRecalcStyleInAllFrames()
 {
     for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (frame->isLocalFrame())
-            toLocalFrame(frame)->document()->styleEngine().resolverChanged(FullStyleUpdate);
+            toLocalFrame(frame)->document()->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Settings));
     }
 }