cc: Add edge case test in spiral iterator unittest.

cc: Add edge case test in spiral iterator unittest.

Add edge case when tiling is smaller than tile size and center rect is
not intersecting to tiling rect. In this around index and consider
index point to the same index and as center rect is not intersecting,
it lies below the tiling rect as shown below. Double line box
represents the tile size, T represents tiling and * represents center
rect.

    ┌───┬══════╗
    │ T │      ║
    ├───┘┌───┐ ║
    ║    │ * │ ║
    ║    └───┘ ║
    ╚══════════╝

In this case, spiral iterator should return tile at (0, 0) as a valid
tile.

BUG=
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Committed: https://crrev.com/4776477be73a1ff287bba2e17ee4963ceecf82a0
Cr-Commit-Position: refs/heads/master@{#420824}

[prashant.n, 2016-09-22 13:33:07]

Description was changed from

==========
cc: Add edge case test in spiral iterator unittest.

Add edge case when tiling is smaller than tile size and center rect is
not intersecting to tiling rect. In this around index and consider
index point to the same index and as center rect is not intersecting,
it lies below the tiling rect as shown below. Double line box
represents the tile size, T represents tiling and * represents center
rect.

    ┌───┬══════╗
    │ T │      ║
    ├───┘┌───┐ ║
    ║    │ * │ ║
    ║    └───┘ ║
    ╚══════════╝

In this case, spiral iterator should return tile at (0, 0) as a valid
tile.

BUG=
==========

to

==========
cc: Add edge case test in spiral iterator unittest.

Add edge case when tiling is smaller than tile size and center rect is
not intersecting to tiling rect. In this around index and consider
index point to the same index and as center rect is not intersecting,
it lies below the tiling rect as shown below. Double line box
represents the tile size, T represents tiling and * represents center
rect.

    ┌───┬══════╗
    │ T │      ║
    ├───┘┌───┐ ║
    ║    │ * │ ║
    ║    └───┘ ║
    ╚══════════╝

In this case, spiral iterator should return tile at (0, 0) as a valid
tile.

BUG=
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

[prashant.n, 2016-09-22 13:38:19]

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

[prashant.n, 2016-09-22 13:38:19]

ptal.

While working on pyramid sequence (PS), many unit tests written for spiral
iterator helped to correct the code in PS, but this case was missing which we
should have.

[vmpstr, 2016-09-23 21:08:17]

lgtm

[prashant.n, 2016-09-24 04:02:51]

The CQ bit was checked by prashant.n@samsung.com

[commit-bot: I haz the power, 2016-09-24 04:03:02]

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

[commit-bot: I haz the power, 2016-09-24 04:17:06]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-09-24 04:19:01]

Description was changed from

==========
cc: Add edge case test in spiral iterator unittest.

Add edge case when tiling is smaller than tile size and center rect is
not intersecting to tiling rect. In this around index and consider
index point to the same index and as center rect is not intersecting,
it lies below the tiling rect as shown below. Double line box
represents the tile size, T represents tiling and * represents center
rect.

    ┌───┬══════╗
    │ T │      ║
    ├───┘┌───┐ ║
    ║    │ * │ ║
    ║    └───┘ ║
    ╚══════════╝

In this case, spiral iterator should return tile at (0, 0) as a valid
tile.

BUG=
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
==========

to

==========
cc: Add edge case test in spiral iterator unittest.

Add edge case when tiling is smaller than tile size and center rect is
not intersecting to tiling rect. In this around index and consider
index point to the same index and as center rect is not intersecting,
it lies below the tiling rect as shown below. Double line box
represents the tile size, T represents tiling and * represents center
rect.

    ┌───┬══════╗
    │ T │      ║
    ├───┘┌───┐ ║
    ║    │ * │ ║
    ║    └───┘ ║
    ╚══════════╝

In this case, spiral iterator should return tile at (0, 0) as a valid
tile.

BUG=
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Committed: https://crrev.com/4776477be73a1ff287bba2e17ee4963ceecf82a0
Cr-Commit-Position: refs/heads/master@{#420824}
==========

[commit-bot: I haz the power, 2016-09-24 04:19:02]

Patchset 2 (id:??) landed as
https://crrev.com/4776477be73a1ff287bba2e17ee4963ceecf82a0
Cr-Commit-Position: refs/heads/master@{#420824}