Bug 111416

Some inspector tests started to crash randomly, so I could not really reproduce it. The crashing tests are on Mac and Qt bots. Unfortunately I couldn't check it on GTK port, because all inspector tests are skipped on GTK. Could xou check it please? For example: Mac: * inspector/elements/expand-recursively.html http://build.webkit.org/results/Apple%20Lion%20Release%20WK1%20%28Tests%29/r144716%20%2810010%29/inspector/runtime/runtime-localStorage-getProperties-crash-log.txt * inspector/extensions/extensions-reload.html http://build.webkit.org/results/Apple%20Lion%20Release%20WK1%20%28Tests%29/r144716%20%2810010%29/inspector/extensions/extensions-reload-crash-log.txt * inspector/runtime/runtime-localStorage-getProperties.html http://build.webkit.org/results/Apple%20Lion%20Release%20WK1%20%28Tests%29/r144716%20%2810010%29/inspector/elements/expand-recursively-crash-log.txt Qt: * http/tests/inspector/network/network-request-revision-content.html http://build.webkit.sed.hu/results/x86-64%20Linux%20Qt%20Release/r144735%20(48823)/http/tests/inspector/resource-tree/resource-tree-events-crash-log.txt * http/tests/inspector/resource-tree/resource-tree-events.html http://build.webkit.sed.hu/results/x86-64%20Linux%20Qt%20Release/r144735%20(48823)/http/tests/inspector/network/network-request-revision-content-crash-log.txt * inspector/runtime/runtime-getProperties-isOwnProperty.html http://build.webkit.sed.hu/results/x86-64%20Linux%20Qt%20Release/r144735%20(48823)/inspector/runtime/runtime-getProperties-isOwnProperty-crash-log.txt * inspector/styles/get-set-stylesheet-text.html http://build.webkit.sed.hu/results/x86-64%20Linux%20Qt%20Release/r144735%20(48823)/inspector/progress-bar-crash-log.txt