Check rect under-invalidations

third_party/WebKit/Source/platform/graphics/paint/PaintController.cpp

 // Copyright 2014 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 "platform/graphics/paint/PaintController.h"
 
 #include "platform/TraceEvent.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DrawingDisplayItem.h"
 #include "third_party/skia/include/core/SkPictureAnalyzer.h"
@@ skipping 398 matching lines @@
     for (const DisplayItem& displayItem : m_currentPaintArtifact.getDisplayItemList()) {
         if (!displayItem.isCacheable())
             continue;
         displayItem.client().setDisplayItemsCached(m_currentCacheGeneration);
     }
 #if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
     DisplayItemClient::endShouldKeepAliveAllClients(this);
 #endif
 }
 
+void PaintController::appendDebugDrawingAfterCommit(const DisplayItemClient& displayItemClient, PassRefPtr<SkPicture> picture, const LayoutSize& offsetFromLayoutObject)
+{
+    DCHECK(m_newDisplayItemList.isEmpty());
+    DrawingDisplayItem& displayItem = m_currentPaintArtifact.getDisplayItemList().allocateAndConstruct<DrawingDisplayItem>(displayItemClient, DisplayItem::DebugDrawing, picture);
+    displayItem.setSkippedCache();
+    m_currentPaintArtifact.getDisplayItemList().appendVisualRect(visualRectForDisplayItem(displayItem, offsetFromLayoutObject));
+}
+
 #if DCHECK_IS_ON()
 
 void PaintController::checkUnderInvalidation(DisplayItemList::iterator& newIt, DisplayItemList::iterator& currentIt)
 {
     DCHECK(RuntimeEnabledFeatures::slimmingPaintUnderInvalidationCheckingEnabled());
     DCHECK(newIt->isCached());
 
     // When under-invalidation-checking is enabled, the forced painting is following the cached display item.
     DisplayItem::Type nextItemType = DisplayItem::nonCachedType(newIt->getType());
     ++newIt;
@@ skipping 110 matching lines @@
 
 void PaintController::showDebugData() const
 {
     WTFLogAlways("current display item list: [%s]\n", displayItemListAsDebugString(m_currentPaintArtifact.getDisplayItemList()).utf8().data());
     WTFLogAlways("new display item list: [%s]\n", displayItemListAsDebugString(m_newDisplayItemList).utf8().data());
 }
 
 #endif // ifndef NDEBUG
 
 } // namespace blink