Introduce DEFINE_INLINE_BOX_TYPE_CASTS, and use it

Introduce DEFINE_INLINE_BOX_TYPE_CASTS, and use it

As a step to use DEFINE_TYPE_CASTS, this cl introduce DEFINE_INLINE_BOX_TYPE_CASTS.
InlineFlowBox, InlineTextBox, SVGInlineTextBox, SVGInlineFlowBox, and
SVGRootInlineBox can use it to generate toFoo() type case helper functions.

BUG=309516
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=163300

[gyuyoung-inactive, 2013-12-05 08:21:32]

Add tkent.

[tkent, 2013-12-05 08:46:22]

How about updating InlineTextBox too?

[gyuyoung-inactive, 2013-12-05 08:57:03]

On 2013/12/05 08:46:22, tkent wrote:
> How about updating InlineTextBox too?

Ok i will update it tonight. Now I am away from pc. ;)

[gyuyoung-inactive, 2013-12-05 23:00:23]

On 2013/12/05 08:57:03, gyuyoung wrote:
> On 2013/12/05 08:46:22, tkent wrote:
> > How about updating InlineTextBox too?
> 
> Ok i will update it tonight. Now I am away from pc. ;)

Patch is updated !

[tkent, 2013-12-05 23:38:08]

lgtm

[commit-bot: I haz the power, 2013-12-05 23:40:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gyuyoung.kim@samsung.com/104593005/40001

[commit-bot: I haz the power, 2013-12-06 03:33:57]

Change committed as 163300