DevTools: improve sort by column usability in heap profiler

DevTools: improve sort by column usability in heap profiler

When sorting by "Constructor" or "Objects count" column in summary view objects of the same class are now sorted by name. The same is now true for the Comparison view: if top level nodes are sorted by constructor name or added/removed/delta count the actual objects on second level will be sorted by name.

BUG=None

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=194307

[yurys, 2015-04-23 14:53:20]

yurys@chromium.org changed reviewers:
+ alph@chromium.org

[yurys, 2015-04-23 14:56:49]

The CQ bit was checked by yurys@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-04-23 14:57:23]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1070273004/20001

[alph, 2015-04-23 14:57:47]

lgtm

[yurys, 2015-04-23 15:38:27]

The CQ bit was unchecked by yurys@chromium.org

[yurys, 2015-04-23 15:38:28]

The CQ bit was checked by yurys@chromium.org

[yurys, 2015-04-23 15:38:33]

The CQ bit was checked by yurys@chromium.org

[commit-bot: I haz the power, 2015-04-23 15:38:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1070273004/20001

[commit-bot: I haz the power, 2015-04-23 16:11:08]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=194307