Prevent scientific notation in LayoutUnit gdb prettyprinter.

Prevent scientific notation in LayoutUnit gdb prettyprinter.

Prevent this by increasing precision on the %g format specifier. Now we can see
full values like 33554431.984375px, instead of having them crippled like
3.35544e+07px.

R=cbiesinger@chromium.org,dpranke@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=197682

[Dirk Pranke, 2015-06-23 19:41:50]

lgtm

[mstensho (USE GERRIT), 2015-06-23 19:45:28]

The CQ bit was checked by mstensho@opera.com

[commit-bot: I haz the power, 2015-06-23 19:46:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1202773002/1

[commit-bot: I haz the power, 2015-06-23 21:49:47]

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

[commit-bot: I haz the power, 2015-06-23 21:49:48]

Try jobs failed on following builders:
  mac_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/60396)

[mstensho (USE GERRIT), 2015-06-23 22:10:16]

The CQ bit was checked by mstensho@opera.com

[cbiesinger, 2015-06-23 22:10:52]

lgtm

[commit-bot: I haz the power, 2015-06-23 22:11:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1202773002/1

[commit-bot: I haz the power, 2015-06-23 23:27:08]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=197682