Web Inspector: do not attempt to load content from resource until request finished...

Web Inspector: do not attempt to load content from resource until request finished loading.
https://bugs.webkit.org/show_bug.cgi?id=83896

Reviewed by Yury Semikhatsky.

Source/WebCore:

When we stop in the inline script on reload, we should only show concatenated script content.
When we resume, we should replace UI source code with the actual HTML content. We should not attempt to
fetch resource content until request finished loading. I regressed it in the Request extraction
and now am bringing it back.

* inspector/front-end/RawSourceCode.js:
(WebInspector.RawSourceCode):
(WebInspector.RawSourceCode.prototype._finishedLoading):
* inspector/front-end/ResourceScriptMapping.js:
(WebInspector.ResourceScriptMapping.prototype.addScript):

LayoutTests:

* inspector/debugger/raw-source-code.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@114135 268f45cc-cd09-0410-ab3c-d52691b4dbfc