Make non-solid-color ContentLayerClient produce no solid color quads.

Make non-solid-color ContentLayerClient produce no solid color quads.

Tests that want to be not solid color do so because they want to use
resources for their quads. Make the FakeContentLayerClient cause every
tile to use resources instead of just tiles across the center of the
layer.

R=ajuma, enne, vmpstr
BUG=427423
Committed: https://crrev.com/8f644e8dd66293e1cf2491a9d3164ee6fdd4adaa
Cr-Commit-Position: refs/heads/master@{#302865}

[ajuma, 2014-11-05 17:18:00]

lgtm

[danakj, 2014-11-05 19:19:30]

The CQ bit was checked by danakj@chromium.org

[danakj, 2014-11-05 19:19:44]

The CQ bit was unchecked by danakj@chromium.org

[danakj, 2014-11-05 19:43:56]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-11-05 19:45:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/686113004/20001

[commit-bot: I haz the power, 2014-11-05 21:10:17]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-11-05 21:10:48]

Patchset 2 (id:??) landed as
https://crrev.com/8f644e8dd66293e1cf2491a9d3164ee6fdd4adaa
Cr-Commit-Position: refs/heads/master@{#302865}