Restore rows() and cols() in aligned_array.h

Restore rows() and cols() in aligned_array.h

These getters were removed in https://codereview.webrtc.org/1172163004
but are used in external code, so it makes sense to keep
them around to make the class more useful.

R=henrikg@webrtc.org, pkasting@chromium.org

Committed: https://chromium.googlesource.com/external/webrtc/+/e8d191f00fff1ed3574d6a9d7e6d62b1acb5d5d3

[kjellander_webrtc, 2015-06-18 08:21:59]

kjellander@webrtc.org changed reviewers:
+ henrikg@webrtc.org

[andresp, 2015-06-18 08:32:13]

andresp@webrtc.org changed reviewers:
+ pkasting@chromium.org

[andresp, 2015-06-18 08:34:35]

On 2015/06/18 08:22:00, kjellander (webrtc) wrote:

Please wait for pkasting approval. Specially we want to know that your added
test guarantees that whatever Peter was using for dead-code detection will not
trigger again for this methods.

[Henrik Grunell WebRTC, 2015-06-18 09:02:35]

lgtm

[Peter Kasting, 2015-06-18 16:22:48]

https://codereview.webrtc.org/1178043005/diff/1/webrtc/system_wrappers/source...
File webrtc/system_wrappers/source/aligned_array_unittest.cc (right):

https://codereview.webrtc.org/1178043005/diff/1/webrtc/system_wrappers/source...
webrtc/system_wrappers/source/aligned_array_unittest.cc:56:
ASSERT_EQ(arr.rows(), 10);
Nit: (expected, actual) (2 places)

[Peter Kasting, 2015-06-18 16:23:42]

On 2015/06/18 08:34:35, andresp1 wrote:
> On 2015/06/18 08:22:00, kjellander (webrtc) wrote:
> 
> Please wait for pkasting approval. Specially we want to know that your added
> test guarantees that whatever Peter was using for dead-code detection will not
> trigger again for this methods.

LGTM; my detection was "manual effort" :).

However, this does mean I'll need to remember to change these to size_t when the
underlying member types change.

[kjellander_webrtc, 2015-06-20 18:11:10]

Committed patchset #1 (id:1) manually as
e8d191f00fff1ed3574d6a9d7e6d62b1acb5d5d3 (presubmit successful).