Make RenderedRectsForMarkers() to ignore disconnected nodes.

third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
index f76a22b37cb8f1d9ffce213a976438a412427ee2..0d3cb339d625724deb79ac63f05ac0e259e39f3b 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
@@ -213,10 +213,8 @@ static void updateMarkerRenderedRect(const Node& node,
     range->setEnd(&const_cast<Node&>(node), marker.endOffset(),
                   IGNORE_EXCEPTION_FOR_TESTING);
   }
-  if (!exceptionState.hadException()) {
-    // TODO(yosin): Once we have a |EphemeralRange| version of |boundingBox()|,
-    // we should use it instead of |Range| version.
-    marker.setRenderedRect(LayoutRect(range->boundingBox()));
+  if (!exceptionState.hadException() && range->isConnected()) {
+    marker.setRenderedRect(LayoutRect(EphemeralRange(range).boundingBox()));
   } else {
     marker.nullifyRenderedRect();
   }