Remove workaround for paint invalidation about percentage transform

third_party/WebKit/Source/core/paint/PaintInvalidator.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/PaintInvalidator.h"
 
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ skipping 351 matching lines @@
     frameView.frame().selection().invalidateCaretRect();
 
   // Temporary callback for crbug.com/487345,402044
   // TODO(ojan): Make this more general to be used by PositionObserver
   // and rAF throttling.
   IntRect visibleRect =
       frameView.rootFrameToContents(frameView.computeVisibleArea());
   layoutView->sendMediaPositionChangeNotifications(visibleRect);
 }
 
-static bool hasPercentageTransform(const ComputedStyle& style) {
-  if (TransformOperation* translate = style.translate()) {
-    if (translate->dependsOnBoxSize())
-      return true;
-  }
-  return style.transform().dependsOnBoxSize() ||
-         (style.transformOriginX() != Length(50, Percent) &&
-          style.transformOriginX().isPercentOrCalc()) ||
-         (style.transformOriginY() != Length(50, Percent) &&
-          style.transformOriginY().isPercentOrCalc());
-}
-
 void PaintInvalidator::invalidatePaintIfNeeded(
     const LayoutObject& object,
     PaintInvalidatorContext& context) {
   object.getMutableForPainting().ensureIsReadyForPaintInvalidation();
 
   if (!context.forcedSubtreeInvalidationFlags &&
       !object
            .shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState())
     return;
 
@@ skipping 33 matching lines @@
           PaintInvalidatorContext::ForcedSubtreeSVGResourceChange;
       break;
     default:
       break;
   }
 
   if (context.oldLocation != context.newLocation)
     context.forcedSubtreeInvalidationFlags |=
         PaintInvalidatorContext::ForcedSubtreeInvalidationChecking;
 
-  // TODO(crbug.com/533277): This is a workaround for the bug. Remove when we
-  // detect paint offset change.
-  if (reason != PaintInvalidationNone &&
-      hasPercentageTransform(object.styleRef()))
-    context.forcedSubtreeInvalidationFlags |=
-        PaintInvalidatorContext::ForcedSubtreeInvalidationChecking;
-
   // TODO(crbug.com/490725): This is a workaround for the bug, to force
   // descendant to update visual rects on clipping change.
   if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled() &&
       context.oldVisualRect != context.newVisualRect
       // Note that isLayoutView() below becomes unnecessary after the launch of
       // root layer scrolling.
       && (object.hasOverflowClip() || object.isLayoutView()) &&
       !toLayoutBox(object).usesCompositedScrolling())
     context.forcedSubtreeInvalidationFlags |=
         PaintInvalidatorContext::ForcedSubtreeInvalidationRectUpdate;
 
   object.getMutableForPainting().clearPaintInvalidationFlags();
 }
 
 void PaintInvalidator::processPendingDelayedPaintInvalidations() {
   for (auto target : m_pendingDelayedPaintInvalidations)
     target->getMutableForPainting().setShouldDoFullPaintInvalidation(
         PaintInvalidationDelayedFull);
 }
 
 }  // namespace blink