- The bug is that we did not handle end_ properly in SearchForNodeInList.
- We now consistently account for sizes on page level in FreeList, except when
  filtering evacuation candidates (those are accounted for in FreeListCategory)

BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1389293005

Cr-Commit-Position: refs/heads/master@{#31307}