Code:  bool UserActivityDetector::PreHandleMouseEvent(aura::Window* target,
                                                aura::MouseEvent* event) {
  MaybeNotify();
   return false;
 }

Vulnerability Type: XSS 
CWE ID: CWE-79
Summary: Cross-site scripting (XSS) vulnerability in Google Chrome before 22.0.1229.79 allows remote attackers to inject arbitrary web script or HTML via vectors related to the Google V8 bindings, aka *Universal XSS (UXSS).*
Commit Message: ash: Make UserActivityDetector ignore synthetic mouse events

This may have been preventing us from suspending (e.g.
mouse event is synthesized in response to lock window being
shown so Chrome tells powerd that the user is active).

BUG=133419
TEST=added


Review URL: https://chromiumcodereview.appspot.com/10574044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@143437 0039d316-1c4b-4281-b951-d872f2087c98