Make RenderedRectsForMarkers() to ignore disconnected nodes.

third_party/WebKit/Source/core/editing/EphemeralRange.cpp

Index: third_party/WebKit/Source/core/editing/EphemeralRange.cpp
diff --git a/third_party/WebKit/Source/core/editing/EphemeralRange.cpp b/third_party/WebKit/Source/core/editing/EphemeralRange.cpp
index 2767484862f96592db1f214fa106e2e365b7abd3..bc12c06648a4a6bd204df3462b2ea574965849c8 100644
--- a/third_party/WebKit/Source/core/editing/EphemeralRange.cpp
+++ b/third_party/WebKit/Source/core/editing/EphemeralRange.cpp
@@ -8,6 +8,8 @@
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
+#include "core/layout/LayoutObject.h"
+#include "core/layout/LayoutText.h"
 
 namespace blink {
 
@@ -119,6 +121,40 @@ PositionTemplate<Strategy> EphemeralRangeTemplate<Strategy>::endPosition()
 }
 
 template <typename Strategy>
+IntRect EphemeralRangeTemplate<Strategy>::boundingBox() const {
+  IntRect result;
+  Vector<IntRect> rects;
+  textRects(rects);
+  for (const IntRect& rect : rects)
+    result.unite(rect);
+  return result;
+}
+
+template <typename Strategy>
+void EphemeralRangeTemplate<Strategy>::textRects(
+    Vector<IntRect>& rects,
+    bool useSelectionHeight) const {
+  Node* startContainer = m_startPosition.computeContainerNode();
+  DCHECK(startContainer);
+  Node* endContainer = m_endPosition.computeContainerNode();
+  DCHECK(endContainer);
+
+  for (Node& node : nodes()) {
+    LayoutObject* layoutObject = node.layoutObject();
+    if (!layoutObject || !layoutObject->isText())
+      continue;
+    LayoutText* layoutText = toLayoutText(layoutObject);
+    unsigned startOffset =
+        node == startContainer ? m_startPosition.offsetInContainerNode() : 0;
+    unsigned endOffset = node == endContainer
+                             ? m_endPosition.offsetInContainerNode()
+                             : std::numeric_limits<unsigned>::max();
+    layoutText->absoluteRectsForRange(rects, startOffset, endOffset,
+                                      useSelectionHeight);
+  }
+}
+
+template <typename Strategy>
 Node* EphemeralRangeTemplate<Strategy>::commonAncestorContainer() const {
   return commonAncestorContainerNode<Strategy>(
       m_startPosition.computeContainerNode(),