Replace coversExtraPixels with simpler logic

third_party/WebKit/Source/core/layout/LayoutObject.cpp

Index: third_party/WebKit/Source/core/layout/LayoutObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.cpp b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
index 4e3cbf445b5bb3b2f91f048884e177cc599ba291..952afea529e7af6937417a00cefe766901d1799e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -1205,9 +1205,9 @@ PaintInvalidationReason LayoutObject::invalidatePaintIfNeeded(
       paintInvalidationState.paintInvalidationContainer();
   DCHECK(paintInvalidationContainer == containerForPaintInvalidation());
 
-  context.oldBounds.rect = previousPaintInvalidationRect();
+  context.oldBounds = previousPaintInvalidationRect();
   context.oldLocation = previousPositionFromPaintInvalidationBacking();
-  context.newBounds.rect =
+  context.newBounds =
       paintInvalidationState.computePaintInvalidationRectInBacking();
   context.newLocation =
       paintInvalidationState.computePositionFromPaintInvalidationBacking();
@@ -1215,11 +1215,11 @@ PaintInvalidationReason LayoutObject::invalidatePaintIfNeeded(
   IntSize adjustment =
       scrollAdjustmentForPaintInvalidation(paintInvalidationContainer);
   context.newLocation.move(adjustment);
-  context.newBounds.rect.move(adjustment);
+  context.newBounds.move(adjustment);
 
-  adjustVisualRectForRasterEffects(context.newBounds.rect);
+  adjustVisualRectForRasterEffects(context.newBounds);
 
-  setPreviousPaintInvalidationRect(context.newBounds.rect);
+  setPreviousPaintInvalidationRect(context.newBounds);
   setPreviousPositionFromPaintInvalidationBacking(context.newLocation);
 
   if (!shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState() &&