Do not count extra trailing space for the last word in a range

third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp

Index: third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
diff --git a/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp b/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
index 8938d190a226763c1461e75f800d7a763177fc3e..2c679bdacf1ff6e921a2da445dcc18c3c91383b4 100644
--- a/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
+++ b/third_party/WebKit/Source/core/editing/iterators/TextIteratorTest.cpp
@@ -459,6 +459,34 @@ TEST_F(TextIteratorTest, RangeLengthWithReplacedElements) {
                                          range->EndPosition()));
 }
 
+TEST_F(TextIteratorTest, RangeLengthInMultilineSpan) {
+  static const char* body_content =
+      "<table style='width:5em'>"
+      "<tbody>"
+      "<tr>"
+      "<td>"
+      "<span id='span1'>one two three four five</span>"
+      "</td>"
+      "</tr>"
+      "</tbody>"
+      "</table>";
+
+  SetBodyContent(body_content);
+  GetDocument().View()->UpdateAllLifecyclePhases();
+
+  Node* span_node = GetDocument().getElementById("span1");
+  Node* text_node = span_node->firstChild();
+
+  // Select the word "two", this is the last word on the line.
+  const Position start = Position(text_node, 4);
+  const Position end = Position(text_node, 7);
+
+  EXPECT_EQ(4, TextIterator::RangeLength(start, end));
+  EXPECT_EQ(3, TextIterator::RangeLength(
+                   start, end,
+                   TextIteratorBehavior::NoTrailingSpaceRangeLengthBehavior()));
+}
+
 TEST_F(TextIteratorTest, WhitespaceCollapseForReplacedElements) {
   static const char* body_content =
       "<span>Some text </span> <input type='button' value='Button "