Turn SVGTextMetricsBuilder into a namespace

Turn SVGTextMetricsBuilder into a namespace

Said class does not carry any state, so turn it into a namespace, marking
previous methods static as appropriate and modify callers.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=168769

[pdr., 2014-03-07 18:49:05]

On 2014/03/07 16:40:57, fs wrote:

We actually don't use this patten much in Blink so I wasn't familiar with the
differences between namespaces and classes. I've read up on it and, as far as I
can tell, this is the right approach and we should use it.

LGTM

I'm going to do a similar patch for SVGRenderSupport.

[pdr., 2014-03-07 18:49:12]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2014-03-07 18:49:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/fs@opera.com/191053002/1

[commit-bot: I haz the power, 2014-03-07 19:19:51]

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

[commit-bot: I haz the power, 2014-03-07 19:19:51]

Try jobs failed on following builders: linux_blink

[pdr., 2014-03-07 19:44:33]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2014-03-07 19:44:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/fs@opera.com/191053002/1

[commit-bot: I haz the power, 2014-03-08 04:02:00]

Change committed as 168769