Revert of Let FrameView track object paint invalidations

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 ce1d5d8ff520e0ca933b14ef4e3446a1896b369a..478175a59ca7b6abd723721afdb2e433e27d994d 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.h
+++ b/third_party/WebKit/Source/core/frame/FrameView.h
@@ -63,7 +63,6 @@
 class Element;
 class FloatSize;
 class HTMLFrameOwnerElement;
-class JSONArray;
 class LayoutPart;
 class LocalFrame;
 class KURL;
@@ -322,11 +321,8 @@
 
     static void setInitialTracksPaintInvalidationsForTesting(bool);
 
-    // These methods are for testing.
     void setTracksPaintInvalidations(bool);
-    bool isTrackingPaintInvalidations() const { return m_trackedObjectPaintInvalidations.get(); }
-    void trackObjectPaintInvalidation(const DisplayItemClient&, PaintInvalidationReason);
-    PassRefPtr<JSONArray> trackedObjectPaintInvalidationsAsJSON() const;
+    bool isTrackingPaintInvalidations() const { return m_isTrackingPaintInvalidations; }
 
     using ScrollableAreaSet = HeapHashSet<Member<ScrollableArea>>;
     void addScrollableArea(ScrollableArea*);
@@ -823,6 +819,8 @@
 
     bool m_safeToPropagateScrollToParent;
 
+    bool m_isTrackingPaintInvalidations; // Used for testing.
+
     unsigned m_visuallyNonEmptyCharacterCount;
     unsigned m_visuallyNonEmptyPixelCount;
     bool m_isVisuallyNonEmpty;
@@ -920,13 +918,6 @@
     bool m_needsScrollbarsUpdate;
     bool m_suppressAdjustViewSize;
     bool m_inPluginUpdate;
-
-    // For testing.
-    struct ObjectPaintInvalidation {
-        String name;
-        PaintInvalidationReason reason;
-    };
-    OwnPtr<Vector<ObjectPaintInvalidation>> m_trackedObjectPaintInvalidations;
 };
 
 inline void FrameView::incrementVisuallyNonEmptyCharacterCount(unsigned count)