Add a FrameView lifecycle method that just updates layout, style and compositing.

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 5340a380b8154b9a30615ee8cfc91ccbcbdfaf6c..a2a24baa7b046242e08ac52057035684d553dcfa 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -227,7 +227,12 @@ public:
 
     Color documentBackgroundColor() const;
 
-    void updateLayoutAndStyleForPainting();
+    // Run all needed lifecycle stages. After calling this method, all frames will be in the lifecycle state PaintInvalidationClean.
+    void updateAllLifecyclePhases();
+
+    // Computes the style, layout and compositing lifecycle stages if needed. After calling this method, all frames wil lbe in a lifecycle
+    // state >= CompositingClean, and scrolling has been updated.
+    void updateLifecycleToCompositingCleanPlusScrolling();
 
     bool invalidateViewportConstrainedObjects();
 
@@ -603,10 +608,11 @@ private:
     virtual void setScrollOffset(const IntPoint&, ScrollType) override;
     virtual void setScrollOffset(const DoublePoint&, ScrollType) override;
 
-    void updateLayoutAndStyleForPaintingInternal();
+    void updateAllLifecyclePhasesInternal();
     void invalidateTreeIfNeededRecursive();
     void scrollContentsIfNeededRecursive();
-    void updateLayoutAndStyleIfNeededRecursive();
+    void updateStyleAndLayoutIfNeededRecursive();
+    void updatePostLifecycleData();
 
     void reset();
     void init();