cc: Show GPU rasterization status within the HUD

LayerTreeHost determines the status, passes it to LayerTreeHostImpl.

HUD adds the new line of text before the memory usage.

BUG=434613

Review URL: https://codereview.chromium.org/774943005

Cr-Commit-Position: refs/heads/master@{#306713}
8 files changed