DevTools: Fix selected item color in heap snapshots.
DevTools: Fix selected item color in heap snapshots.

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/156743002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@166702 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs