Convert string literals to character literals in makeString usage
https://bugs.webkit.org/show_bug.cgi?id=136394

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2014-08-30
Reviewed by Sam Weinig.

* inspector/InspectorOverlay.cpp:
(WebCore::InspectorOverlay::evaluateInOverlay):
* loader/FrameLoader.cpp:
(WebCore::FrameLoader::setOriginalURLForDownloadRequest):
* loader/MixedContentChecker.cpp:
(WebCore::MixedContentChecker::logWarning):
* page/ContentSecurityPolicy.cpp:
(WebCore::CSPDirectiveList::checkMediaTypeAndReportViolation):
(WebCore::ContentSecurityPolicy::reportUnsupportedDirective):
(WebCore::ContentSecurityPolicy::reportInvalidPathCharacter):
Also reorder some code to ensure single string creation.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173142 268f45cc-cd09-0410-ab3c-d52691b4dbfc