[SPInvalidation] Invalidate all paint and properties for printing

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

 // 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.
 
 #ifndef PaintInvalidator_h
 #define PaintInvalidator_h
 
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/paint/GeometryMapper.h"
 #include "wtf/Vector.h"
@@ skipping 31 matching lines @@
 
   enum ForcedSubtreeInvalidationFlag {
     ForcedSubtreeInvalidationChecking = 1 << 0,
     ForcedSubtreeInvalidationRectUpdate = 1 << 1,
     ForcedSubtreeFullInvalidation = 1 << 2,
     ForcedSubtreeFullInvalidationForStackedContents = 1 << 3,
     ForcedSubtreeSVGResourceChange = 1 << 4,
     // TODO(crbug.com/637313): This is temporary before we support filters in
     // paint property tree.
     ForcedSubtreeSlowPathRect = 1 << 5,
+    // For SPv1, all of the above flags don't cross paint invalidation container

[pdr., 2016/12/15 06:07:24]

Similar question as above--why do we need to invalidate paint in more cases than
spv1?

+    // boundary. ForceWholeTreeFullInvalidation does.
+    // TODO(wangxianzhu): Combine this with ForcedSubtreeFullInvalidation when
+    // removing non-SPv2 code.
+    ForcedWholeTreeFullInvalidation = 1 << 6,
   };
   unsigned forcedSubtreeInvalidationFlags = 0;
 
   // The following fields can be null only before
   // PaintInvalidator::updateContext().
 
   // The current paint invalidation container for normal flow objects.
   // It is the enclosing composited object.
   const LayoutBoxModelObject* paintInvalidationContainer = nullptr;
 
@@ skipping 48 matching lines @@
   void updatePaintingLayer(const LayoutObject&, PaintInvalidatorContext&);
   void updateContext(const LayoutObject&, PaintInvalidatorContext&);
 
   Vector<const LayoutObject*> m_pendingDelayedPaintInvalidations;
   GeometryMapper m_geometryMapper;
 };
 
 }  // namespace blink
 
 #endif  // PaintInvalidator_h