DO NOT LAND: Test no paint invalidation for LayoutText.

third_party/WebKit/Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  *               (http://www.torchmobile.com/)
@@ skipping 3351 matching lines @@
       isUpgradingDelayedFullToFull) {
     if (reason == PaintInvalidationFull)
       reason =
           documentLifecycleBasedPaintInvalidationReason(document().lifecycle());
     m_bitfields.setFullPaintInvalidationReason(reason);
     if (!isUpgradingDelayedFullToFull)
       markAncestorsForPaintInvalidation();
   }
 
   frameView()->scheduleVisualUpdateForPaintInvalidationIfNeeded();
+
+  if (isText())
+    parent()->setShouldDoFullPaintInvalidation();
 }
 
 void LayoutObject::setMayNeedPaintInvalidation() {
   if (mayNeedPaintInvalidation())
     return;
   m_bitfields.setMayNeedPaintInvalidation(true);
   markAncestorsForPaintInvalidation();
   frameView()->scheduleVisualUpdateForPaintInvalidationIfNeeded();
+  if (isText())
+    parent()->setShouldDoFullPaintInvalidation();
 }
 
 void LayoutObject::setMayNeedPaintInvalidationSubtree() {
   if (mayNeedPaintInvalidationSubtree())
     return;
   m_bitfields.setMayNeedPaintInvalidationSubtree(true);
   setMayNeedPaintInvalidation();
+  if (isText())
+    parent()->setShouldDoFullPaintInvalidation();
 }
 
 void LayoutObject::setMayNeedPaintInvalidationAnimatedBackgroundImage() {
   if (mayNeedPaintInvalidationAnimatedBackgroundImage())
     return;
   m_bitfields.setMayNeedPaintInvalidationAnimatedBackgroundImage(true);
   setMayNeedPaintInvalidation();
 }
 
 void LayoutObject::clearPaintInvalidationFlags() {
@@ skipping 98 matching lines @@
     const blink::LayoutObject* root = object1;
     while (root->parent())
       root = root->parent();
     root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
   } else {
     WTFLogAlways("%s", "Cannot showLayoutTree. Root is (nil)");
   }
 }
 
 #endif