Indexer needs to recognize functions passed as callback parameters

[stevemessick]

The sample code generated by New Application contains a definition of rotateText() that is used as a callback in the expression: query("#text").on.click.add(rotateText);

That reference is not found by Open Callers or Find References. Current thinking is that the indexer isn't recording the relationship. However, hyperlinking does work.

Since sample code changes, here's the current output from New Application:

import('dart:html');

num rotatePos = 0;

void main() {
  query("#text").text = "Welcome to Dart!";

  query("#text").on.click.add(rotateText);
}

void rotateText(Event event) {
  rotatePos += 360;

  var textElement = query("#text");

  textElement.style.transition = "1s";
  textElement.style.transform = "rotate(${rotatePos}deg)";
}

[bwilkerson]

Partial fix in http://codereview.chromium.org/10780040/.

This records a relationship (IndexConstants.IS_REFERENCED_BY) between the function and the reference site, but the callers calculation might beed to be updated to query for this relationship.

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Added Started label.

[bwilkerson]

Set owner to @stevemessick.

[stevemessick]

Added Fixed label.