Directly use the Skia canvas API in LinkHighlight::paintContents
Directly use the Skia canvas API in LinkHighlight::paintContents

There's no need to create a recording context in LinkHighlight because
we do not need to cache this.

BUG=469386

Review URL: https://codereview.chromium.org/1023863005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@192415 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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