commit 28fc48705db361c2fd93cd302c0d15c2a1ed8da4
author rlanday <rlanday@chromium.org> Wed Jun 28 03:29:23 2017
committer Commit Bot <commit-bot@chromium.org> Wed Jun 28 03:29:23 2017
tree 6dc37b2dbaddf79e985dbae881a9157b1f95927f
parent 2ce5f3fefd8958335fa480544794e7523625b26d

Optimize DocumentMarkerController::MarkerAtPosition()

This method is used in some selection-related operations to look for spellcheck
markers. Now that we have DocumentMarkerList::MarkersIntersectingRange() (added
in https://codereview.chromium.org/2952953002) which uses binary search, we no
longer need to do a linear search over all the markers in the node to implement
this method.

BUG=707867

Review-Url: https://codereview.chromium.org/2949333002
Cr-Commit-Position: refs/heads/master@{#482871}