Revert of SkPaint: eliminate some dead bytes in 64-bit build. (https://codereview.chromium.org/203203003/)

Reason for revert:
Causing RunTest failures on Android.

Original issue's description:
> SkPaint: eliminate some dead bytes in 64-bit build.
>
> + memcpy-based copy constructor was hiding this gap -> manual copy constructor.
> + Split tests for finer-grained failures.
>
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=13856

R=reed@google.com, mtklein@google.com, mtklein@chromium.org
TBR=mtklein@chromium.org, mtklein@google.com, reed@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: jcgregorio@google.com

Review URL: https://codereview.chromium.org/204543002

git-svn-id: http://skia.googlecode.com/svn/trunk@13858 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed