Backed out changeset 31c0fd2b6e8d (bug 1127321) for crashes on a CLOSED TREE

gfx/layers/client/TiledContentClient.cpp

@@ -517,7 +517,6 @@ TileClient::TileClient(const TileClient& o)
   mManager = o.mManager;
   mInvalidFront = o.mInvalidFront;
   mInvalidBack = o.mInvalidBack;
-  mExpirationState = o.mExpirationState;
 }
 
 TileClient&
@@ -537,7 +536,6 @@ TileClient::operator=(const TileClient& o)
   mManager = o.mManager;
   mInvalidFront = o.mInvalidFront;
   mInvalidBack = o.mInvalidBack;
-  mExpirationState = o.mExpirationState;
   return *this;
 }