Code:  void WtsSessionProcessDelegate::Core::KillProcess(DWORD exit_code) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   channel_.reset();
 
   if (launch_elevated_) {
     if (job_.IsValid()) {
      TerminateJobObject(job_, exit_code);
    }
  } else {
    if (worker_process_.IsValid()) {
      TerminateProcess(worker_process_, exit_code);
    }
  }
}

Vulnerability Type: DoS 
CWE ID: CWE-399
Summary: Use-after-free vulnerability in Google Chrome before 24.0.1312.52 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving PDF fields.
Commit Message: Validate and report peer's PID to WorkerProcessIpcDelegate so it will be able to duplicate handles to and from the worker process.

As a side effect WorkerProcessLauncher::Delegate is now responsible for retrieving the client's PID and deciding whether a launch failed due to a permanent error condition.

BUG=134694


Review URL: https://chromiumcodereview.appspot.com/11143025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162778 0039d316-1c4b-4281-b951-d872f2087c98