Make copyTextTo() of text iterators check the length parameter

third_party/WebKit/Source/core/editing/iterators/TextIterator.h

Index: third_party/WebKit/Source/core/editing/iterators/TextIterator.h
diff --git a/third_party/WebKit/Source/core/editing/iterators/TextIterator.h b/third_party/WebKit/Source/core/editing/iterators/TextIterator.h
index 8e0b8b822bb04947ef4ac62d747d2b140d298454..29eebff624dd89683221bbdd48b37bb30eb54526 100644
--- a/third_party/WebKit/Source/core/editing/iterators/TextIterator.h
+++ b/third_party/WebKit/Source/core/editing/iterators/TextIterator.h
@@ -82,6 +82,7 @@ public:
     // Calculate the minimum |actualLength >= minLength| such that code units
     // with offset range [position, position + actualLength) are whole code
     // points. Append these code points to |output| and return |actualLength|.
+    // TODO(xiaochengh): Use (start, end) instead of (start, length).
     int copyTextTo(ForwardsTextBuffer* output, int position, int minLength) const;
     // TODO(xiaochengh): Avoid default parameters.
     int copyTextTo(ForwardsTextBuffer* output, int position = 0) const;