Fix a typo in deletion loop.

BUG=None
R=mukai@chromium.org
TBR=mukai@chromium.org

Review URL: https://codereview.chromium.org/323573002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275480 0039d316-1c4b-4281-b951-d872f2087c98

athena/activity/activity_manager_impl.cc

@@ -24,7 +24,7 @@ class ActivityManagerImpl : public ActivityManager {
     instance = this;
   }
   virtual ~ActivityManagerImpl() {
-    while (activities_.empty())
+    while (!activities_.empty())
       delete activities_.front();
 
     CHECK_EQ(this, instance);