This reverts commit 3f286cd1.

Reason for revert: crbug.com/786603

Original change's description:
> Clean up the TType class.
> 
> Move more methods into the cpp file, and rename member variables to
> start with the "m" prefix.
> 
> Also move most of the TPublicType methods into the cpp.
> 
> Bug: angleproject:1432
> Change-Id: Ib11a3c8c6ace654fd52077a317814665f81a7261
> Reviewed-on: https://chromium-review.googlesource.com/776276
> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
> Commit-Queue: Jamie Madill <jmadill@chromium.org>

TBR=jmadill@chromium.org,oetuaho@nvidia.com,kainino@chromium.org

Change-Id: Ib3062a71118095a3e58e75bfee2474c2e4ae9431
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:1432
Reviewed-on: https://chromium-review.googlesource.com/777801Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>