cc: Add functions for getting absolute tile indices.

cc: Add functions for getting absolute tile indices.

This patch adds functions TileAbsoluteXIndexFromSrcCoord() and
TileAbsoluteYIndexFromSrcCoord() for returning absolute tile indices,
which are required to compute better tile iteration order, when center
rect is far away from consider rect. The absolute indices are returned
assuming tiling size to be infinite in all quadrants.

BUG=629052
TEST=cc_unittests --gtest_filter=TilingDataTest.TileAbsolute*
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

[prashant.n, 2016-10-25 10:19:52]

Description was changed from

==========
cc: Add functions for getting absolute tile indices.

This patch adds functions TileAbsoluteXIndexFromSrcCoord() and
TileAbsoluteYIndexFromSrcCoord() for returning absolute tile indices,
which are required to compute better tile iteration order, when center
rect is far away from consider rect. The absolute indices are returned
assuming tiling size to be infinite in all quadrants.

BUG=629052
TEST=cc_unittests --gtest_filter=TilingDataTest.TileAbsolute*
==========

to

==========
cc: Add functions for getting absolute tile indices.

This patch adds functions TileAbsoluteXIndexFromSrcCoord() and
TileAbsoluteYIndexFromSrcCoord() for returning absolute tile indices,
which are required to compute better tile iteration order, when center
rect is far away from consider rect. The absolute indices are returned
assuming tiling size to be infinite in all quadrants.

BUG=629052
TEST=cc_unittests --gtest_filter=TilingDataTest.TileAbsolute*
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

[prashant.n, 2016-10-25 10:22:36]

The CQ bit was checked by prashant.n@samsung.com to run a CQ dry run

[commit-bot: I haz the power, 2016-10-25 10:23:01]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[prashant.n, 2016-10-25 10:23:03]

prashant.n@samsung.com changed reviewers:
+ vmpstr@chromium.org

[prashant.n, 2016-10-25 10:23:04]

ptal

[commit-bot: I haz the power, 2016-10-25 11:16:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-25 11:16:01]

Dry run: This issue passed the CQ dry run.

[prashant.n, 2016-11-15 01:54:56]

The other cl for pyramid sequence is almost ready. This CL adds support
functions needed for pyramid sequence. Kindly review this.