DO NOT LAND: Test no paint invalidation for LayoutText.

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 360 matching lines @@
 
   if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
     ScopedUndoFrameViewContentClipAndScroll undo(frameView, context);
     frameView.invalidatePaintOfScrollControlsIfNeeded(context);
   }
 }
 
 void PaintInvalidator::invalidatePaintIfNeeded(
     const LayoutObject& object,
     PaintInvalidatorContext& context) {
+  if (object.isText())
+    return;
   object.getMutableForPainting().ensureIsReadyForPaintInvalidation();
 
   // The paint offset should already be updated through
   // PaintPropertyTreeBuilder::updatePropertiesForSelf.
   DCHECK(context.treeBuilderContext.current.paintOffset ==
          object.paintOffset());
 
   if (!context.forcedSubtreeInvalidationFlags &&
       !object
            .shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState())
@@ skipping 56 matching lines @@
         PaintInvalidatorContext::ForcedSubtreeInvalidationRectUpdate;
 }
 
 void PaintInvalidator::processPendingDelayedPaintInvalidations() {
   for (auto target : m_pendingDelayedPaintInvalidations)
     target->getMutableForPainting().setShouldDoFullPaintInvalidation(
         PaintInvalidationDelayedFull);
 }
 
 }  // namespace blink