Revert "Generate enum/getters/setters/mappings for PageSizeType and generate getters/setters for PageSize."

This reverts commit e1b10b8ab263cdf7846de378f2782985c3dd07eb.

Reason for revert: 
seems to cause compile issues on  https://build.chromium.org/p/chromium.chromiumos/builders/ChromiumOS%20x86-generic%20Compile

Original change's description:
> Generate enum/getters/setters/mappings for PageSizeType and generate getters/setters for PageSize.
> 
> Currently, the PageSizeType property is a 'storage_only' field, so
> it has no generated public getters/setters.
> 
> This patch changes it to a 'keyword' field so that its getters/setters
> can be generated as well. We also generate the EPageSizeType enum and
> use the generated CSSValueID <-> EPageSizeType mappings.
> 
> Currently, the PageSize property is a 'storage_only' field, so
> it has no generated public getters/setters. This patch changes it to an
> 'external' field so that its getters/setters can be generated as well.
> 
> Diff: https://gist.github.com/nainar/9f0f24e428c1371b82650892ba276982/revisions
> 
> BUG=628043
> 
> Change-Id: I6410b091cbe49fefe2d6147be081a9b600c49e51
> Reviewed-on: https://chromium-review.googlesource.com/536214
> Reviewed-by: Darren Shen <shend@chromium.org>
> Reviewed-by: meade_UTC10 <meade@chromium.org>
> Reviewed-by: Kentaro Hara <haraken@chromium.org>
> Commit-Queue: nainar <nainar@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#479987}

TBR=haraken@chromium.org,nainar@chromium.org,meade@chromium.org,shend@chromium.org

Change-Id: I6f6856f8b34f5b137dae2d31a2d7dfdb6c21df89
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 628043
Reviewed-on: https://chromium-review.googlesource.com/538632
Reviewed-by: Markus Heintz <markusheintz@chromium.org>
Commit-Queue: Markus Heintz <markusheintz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#479998}
5 files changed