Code: void PPB_URLLoader_Impl::LastPluginRefWasDeleted(bool instance_destroyed) {
  Resource::LastPluginRefWasDeleted(instance_destroyed);
  if (instance_destroyed) {
    loader_.reset();
  }
 }

Vulnerability Type: DoS 
CWE ID: CWE-399
Summary: Use-after-free vulnerability in Google Chrome before 13.0.782.107 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to instantiation of the Pepper plug-in.
Commit Message: Maintain a map of all resources in the resource tracker and clear instance back pointers when needed,

BUG=85808
Review URL: http://codereview.chromium.org/7196001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@89746 0039d316-1c4b-4281-b951-d872f2087c98