cc: Make IsReadyToDraw/NeedsRaster usage consistent.

cc: Make IsReadyToDraw/NeedsRaster usage consistent.

There are two ways of accessing IsReadyToDraw and NeedsRaster. One is
via tile->IsReadyToDraw(), the other is via
tile->draw_info().IsReadyToDraw(). The first one is actually does the
same thing as the second one. This patch removes the shortcut and
makes all uses of this functionality consistent.

R=enne

Committed: https://crrev.com/3619e48edfdfad6683c55992103d89897108783f
Cr-Commit-Position: refs/heads/master@{#329996}

[vmpstr, 2015-05-14 20:49:54]

Please take a look.

[enne (OOO), 2015-05-14 23:45:39]

The CQ bit was checked by enne@chromium.org

[enne (OOO), 2015-05-14 23:45:39]

lgtm

[commit-bot: I haz the power, 2015-05-14 23:46:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1139673008/1

[commit-bot: I haz the power, 2015-05-15 00:39:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-15 00:40:43]

Patchset 1 (id:??) landed as
https://crrev.com/3619e48edfdfad6683c55992103d89897108783f
Cr-Commit-Position: refs/heads/master@{#329996}