Revert of Add a FOUC painting test.

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index bd0f6ddade508541c5aa796809f46b2b20c1edd1..447ac80c546a25b52b9c4bedd5fe94ec7a119198 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -108,8 +108,6 @@
 static const unsigned maxUpdateWidgetsIterations = 2;
 static const double resourcePriorityUpdateDelayAfterScroll = 0.250;
 
-static bool s_initialTrackAllPaintInvalidations = false;
-
 FrameView::FrameView(LocalFrame* frame)
     : m_frame(frame)
     , m_displayMode(WebDisplayModeBrowser)
@@ -208,7 +206,7 @@
     m_safeToPropagateScrollToParent = true;
     m_lastViewportSize = IntSize();
     m_lastZoomFactor = 1.0f;
-    m_isTrackingPaintInvalidations = s_initialTrackAllPaintInvalidations;
+    m_isTrackingPaintInvalidations = false;
     m_lastPaintTime = 0;
     m_isPainting = false;
     m_visuallyNonEmptyCharacterCount = 0;
@@ -2806,11 +2804,6 @@
     }
 
     return parentPoint;
-}
-
-void FrameView::setInitialTracksPaintInvalidationsForTesting(bool trackPaintInvalidations)
-{
-    s_initialTrackAllPaintInvalidations = trackPaintInvalidations;
 }
 
 void FrameView::setTracksPaintInvalidations(bool trackPaintInvalidations)