https://bugs.webkit.org/show_bug.cgi?id=83570

Reviewed by Yury Semikhatsky.

Source/WebCore:

We already expect it to be a string in all the code, we never use the error code in it.

* inspector/front-end/InspectorBackend.js:
(InspectorBackendClass.prototype.dispatch):

LayoutTests:

* inspector/debugger/debugger-set-breakpoint-regex-expected.txt:
* inspector/debugger/debugger-set-breakpoint-regex.html:
* inspector/elements/resolve-node-blocked-expected.txt:
* inspector/elements/set-attribute.html:
* inspector/profiler/heap-snapshot-inspect-dom-wrapper-expected.txt:
* inspector/report-protocol-errors-expected.txt:
* inspector/report-protocol-errors.html:
* inspector/styles/set-property-boundaries-expected.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113711 268f45cc-cd09-0410-ab3c-d52691b4dbfc