Turn off the old compositing path for SPv2.

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

Index: third_party/WebKit/Source/core/frame/FrameView.h
diff --git a/third_party/WebKit/Source/core/frame/FrameView.h b/third_party/WebKit/Source/core/frame/FrameView.h
index 464953ad0d065036ef9cc5aaa9a588a63fabdee8..41990a3424389ed09b1836a96abeaa59b5b10588 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.h
+++ b/third_party/WebKit/Source/core/frame/FrameView.h
@@ -79,6 +79,7 @@ class LayoutObject;
 class LayoutReplaced;
 class LayoutScrollbarPart;
 class LayoutView;
+class PaintController;
 class PaintInvalidationState;
 class Page;
 class ScrollingCoordinator;
@@ -250,10 +251,6 @@ public:
     // Everything except paint (the last phase).
     void updateAllLifecyclePhasesExceptPaint();
 
-    // Computes the style, layout and compositing lifecycle stages if needed. After calling this method, all frames will be in a lifecycle
-    // state >= CompositingClean, and scrolling has been updated (unless throttling is allowed).
-    void updateLifecycleToCompositingCleanPlusScrolling();
-
     // Computes only the style and layout lifecycle stages.
     // After calling this method, all frames will be in a lifecycle state >= LayoutClean (unless throttling is allowed).
     void updateLifecycleToLayoutClean();
@@ -951,6 +948,9 @@ private:
         PaintInvalidationReason reason;
     };
     std::unique_ptr<Vector<ObjectPaintInvalidation>> m_trackedObjectPaintInvalidations;
+
+    // For Slimming Paint v2 only.
+    std::unique_ptr<PaintController> m_paintController;
 };
 
 inline void FrameView::incrementVisuallyNonEmptyCharacterCount(unsigned count)