Add more details to showLineTree() output

Add more details to showLineTree() output

Sample of the new output:
    InlineFlowBox       0x397ffa898130          RenderInline 0x397ffa840170 {pos=30,13 size=212.271,15} baseline=24/20


R=ojan@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170229

[pdr., 2014-03-27 23:31:56]

On 2014/03/27 23:27:33, cbiesinger wrote:

LGTM, I wrote almost the exact same thing last night.

[pdr., 2014-03-27 23:32:16]

On 2014/03/27 23:31:56, pdr wrote:
> On 2014/03/27 23:27:33, cbiesinger wrote:
> 
> LGTM, I wrote almost the exact same thing last night.

Could you provide a sample of the output in the change description?

[cbiesinger, 2014-03-27 23:43:35]

On 2014/03/27 23:32:16, pdr wrote:
> On 2014/03/27 23:31:56, pdr wrote:
> > On 2014/03/27 23:27:33, cbiesinger wrote:
> > 
> > LGTM, I wrote almost the exact same thing last night.
> 
> Could you provide a sample of the output in the change description?

Done!

[cbiesinger, 2014-03-27 23:43:40]

The CQ bit was checked by cbiesinger@chromium.org

[commit-bot: I haz the power, 2014-03-27 23:43:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/cbiesinger@chromium.org/215583003/20001

[commit-bot: I haz the power, 2014-03-28 00:32:16]

Change committed as 170229