DevTools: [CanvasProfiler] Fix crash on Linux Debug.
DevTools: [CanvasProfiler] Fix crash on Linux Debug.

Do not modify HashMap/HashTable during it's iteration.

BUG=261079
R=yurys@chromium.org

Review URL: https://chromiumcodereview.appspot.com/19510004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@154394 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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