Restore only the collapsed leading space when copy text

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

 /*
  * Copyright (c) 2013, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 515 matching lines @@
 
 TEST_F(TextIteratorTest, PreserveLeadingSpace)
 {
     setBodyContent("<div style='width: 2em;'><b><i>foo</i></b> bar</div>");
     Element* div = document().querySelector("div");
     Position start(div->firstChild()->firstChild()->firstChild(), 0);
     Position end(div->lastChild(), 4);
     EXPECT_EQ("foo bar", plainText(EphemeralRange(start, end), TextIteratorEmitsImageAltText));
 }
 
+TEST_F(TextIteratorTest, PreserveOnlyLeadingSpace)
+{
+    setBodyContent("<div style='width: 2em;'><b><i>foo </i></b> bar</div>");
+    Element* div = document().querySelector("div");
+    Position start(div->firstChild()->firstChild()->firstChild(), 0);

[yosin_UTC9, 2016/09/15 01:41:12]

Could you use "id" attribute and |getElementById()| rather than cascading
|firstChild()|?

+    Position end(div->lastChild(), 4);
+    EXPECT_EQ("foo bar", plainText(EphemeralRange(start, end), TextIteratorEmitsImageAltText));
+}
+
 } // namespace blink