Fix crash in tracing due to identical type names of blink gc objects.

Fix crash in tracing due to identical type names of blink gc objects.

The WTF_PRETTY_FUNCTION takes the name of the class using the typename
given by the compiler. This gives the base class name for all
sub-classes. To make the dump name unique the, gcInfoIndex is appended
to the object name.

BUG=521490
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=200975

[ssid, 2015-08-19 20:44:46]

ssid@chromium.org changed reviewers:
+ hajimehoshi@chromium.org, haraken@chromium.org

[ssid, 2015-08-19 20:44:47]

This adds the index to the dump name to make it unique.
I can't think of any other solution to get the actual type names. PTAL.

[haraken, 2015-08-19 23:52:08]

LGTM

[hajimehoshi, 2015-08-20 01:14:30]

lgtm, thanks!

[ssid, 2015-08-20 13:33:36]

The CQ bit was checked by ssid@chromium.org

[commit-bot: I haz the power, 2015-08-20 13:34:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1303693005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1303693005/1

[commit-bot: I haz the power, 2015-08-20 18:53:49]

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

[commit-bot: I haz the power, 2015-08-20 18:53:50]

Try jobs failed on following builders:
  linux_android_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_r...)

[ssid, 2015-08-21 08:32:31]

The CQ bit was checked by ssid@chromium.org

[commit-bot: I haz the power, 2015-08-21 08:32:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1303693005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1303693005/1

[commit-bot: I haz the power, 2015-08-21 08:37:26]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=200975