DO NOT LAND: Test no paint invalidation for LayoutText.

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

Index: third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
index 0548d0fafb2748aa0c73f1f1a6a4143f93290d5b..763faa30d4bfb324642eb241012681b8160854e6 100644
--- a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -378,6 +378,8 @@ void PaintInvalidator::invalidatePaintIfNeeded(
 void PaintInvalidator::invalidatePaintIfNeeded(
     const LayoutObject& object,
     PaintInvalidatorContext& context) {
+  if (object.isText())
+    return;
   object.getMutableForPainting().ensureIsReadyForPaintInvalidation();
 
   // The paint offset should already be updated through