Ignore visual rect/paint offset change under LayoutSVGHiddenContainer

third_party/WebKit/Source/core/paint/FindPaintOffsetAndVisualRectNeedingUpdate.h

 // Copyright 2017 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.
 
 #ifndef FindPaintOffsetAndVisualRectNeedingUpdate_h
 #define FindPaintOffsetAndVisualRectNeedingUpdate_h
 
 #if DCHECK_IS_ON()
 
 #include "core/layout/LayoutObject.h"
@@ skipping 73 matching lines @@
 
   static LayoutRect InflatedRect(const LayoutRect& r) {
     LayoutRect result = r;
     result.Inflate(1);
     return result;
   }
 
   void CheckVisualRect(const LayoutRect& new_visual_rect) {
     if (needed_visual_rect_update_)
       return;
+    if (context_.forced_subtree_invalidation_flags &
+        PaintInvalidatorContext::kForcedSubtreeNoRasterInvalidation)
+      return;
+
     DCHECK((old_visual_rect_.IsEmpty() && new_visual_rect.IsEmpty()) ||
            object_.EnclosingLayer()->SubtreeIsInvisible() ||
            old_visual_rect_ == new_visual_rect ||
            // The following check is to tolerate the differences caused by
            // pixel snapping that may happen for one rect but not for another
            // while we need neither paint invalidation nor raster invalidation
            // for the change. This may miss some real subpixel changes of visual
            // rects. TODO(wangxianzhu): Look into whether we can tighten this
            // for SPv2.
            (InflatedRect(old_visual_rect_).Contains(new_visual_rect) &&
@@ skipping 47 matching lines @@
         old_location_(ObjectPaintInvalidator(object).LocationInBacking()) {}
 
   ~FindObjectVisualRectNeedingUpdateScope() {
     CheckVisualRect(object_.VisualRect());
     CheckLocation();
   }
 
   void CheckLocation() {
     if (needed_visual_rect_update_)
       return;
+    if (context_.forced_subtree_invalidation_flags &
+        PaintInvalidatorContext::kForcedSubtreeNoRasterInvalidation)
+      return;
+
     LayoutPoint new_location =
         ObjectPaintInvalidator(object_).LocationInBacking();
     // Location of LayoutText and non-root SVG is location of the visual rect
     // which have been checked above.
     DCHECK(object_.IsText() || object_.IsSVGChild() ||
            new_location == old_location_ ||
            object_.EnclosingLayer()->SubtreeIsInvisible() ||
            // See checkVisualRect for the issue of approximation.
            LayoutRect(-1, -1, 2, 2)
                .Contains(LayoutRect(LayoutPoint(new_location - old_location_),
                                     LayoutSize())))
         << "Location changed without needing update"
         << " object=" << object_.DebugName()
         << " old=" << old_location_.ToString()
         << " new=" << new_location.ToString();
   }
 
  private:
   LayoutPoint old_location_;
 };
 
 }  // namespace blink
 
 #endif  // DCHECK_IS_ON()
 
 #endif  // FindPaintOffsetAndVisualRectNeedingUpdate_h