New NetworkProcess can ASSERT after old NetworkProcess crashes
https://bugs.webkit.org/show_bug.cgi?id=107970

Reviewed by Alexey Proskuryakov.

* NetworkProcess/NetworkConnectionToWebProcess.cpp:
(WebKit::NetworkConnectionToWebProcess::removeLoadIdentifier): Don't tell the scheduler
  to remove a loader that doesn't exist, as we might be recovering from a crash.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140852 268f45cc-cd09-0410-ab3c-d52691b4dbfc
        REGRESSION: System directory prefix doesn't have a "+"
        https://bugs.webkit.org/show_bug.cgi?id=107971

        Reviewed by Brady Eidson.

        * Shared/mac/ChildProcessMac.mm: (WebKit::ChildProcess::initializeSandbox):
        Re-added the "+".



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140853 268f45cc-cd09-0410-ab3c-d52691b4dbfc