LayoutObject::absoluteBoundingBoxRectForRange() should take EphemeralRange

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 4030 matching lines @@
 }
 
 Position skipWhitespace(const Position& position) {
   return skipWhitespaceAlgorithm(position);
 }
 
 PositionInFlatTree skipWhitespace(const PositionInFlatTree& position) {
   return skipWhitespaceAlgorithm(position);
 }
 
+template <typename Strategy>
+static Vector<FloatQuad> textQuadAlgorithm(
+    const EphemeralRangeTemplate<Strategy>& range) {
+  const PositionTemplate<Strategy> startPosition = range.startPosition();
+  const PositionTemplate<Strategy> endPosition = range.endPosition();
+  Node* startContainer = startPosition.computeContainerNode();
+  DCHECK(startContainer);
+  Node* endContainer = endPosition.computeContainerNode();
+  DCHECK(endContainer);
+
+  Vector<FloatQuad> quad;
+  for (Node& node : range.nodes()) {
+    LayoutObject* layoutObject = node.layoutObject();
+    if (!layoutObject || !layoutObject->isText())
+      continue;
+    LayoutText* layoutText = toLayoutText(layoutObject);
+    unsigned startOffset =
+        node == startContainer ? startPosition.offsetInContainerNode() : 0;
+    unsigned endOffset = node == endContainer
+                             ? endPosition.offsetInContainerNode()
+                             : std::numeric_limits<unsigned>::max();
+    layoutText->absoluteQuadsForRange(quad, startOffset, endOffset);
+  }
+  return quad;
+}
+
+Vector<FloatQuad> textQuad(const EphemeralRange& range) {

[Xiaocheng, 2017/03/30 18:46:19]

nit: s/textQuad/textQuads/

+  return textQuadAlgorithm(range);
+}
+
+Vector<FloatQuad> textQuad(const EphemeralRangeInFlatTree& range) {

[Xiaocheng, 2017/03/30 18:46:19]

nit: nit: s/textQuad/textQuads/

+  return textQuadAlgorithm(range);
+}
+
 }  // namespace blink