DevTools: REGRESSION: Missing 'warning' in the CPU Profiler for functions that can't be optimized

It was regressed at r171140 Create data object once in ProfileDataGridNode's constructor instead of overriding get data

BUG=368158

Review URL: https://codereview.chromium.org/265813011

git-svn-id: svn://svn.chromium.org/blink/trunk@173289 bbb929c8-8fbe-4397-9dbb-9b2b20218538