Revert "Detect Chrome either by renderer or version strings."

Revert "Detect Chrome either by renderer or version strings."

This reverts commit be4eed2ef77d5e8c3e3920664fdc787e196ac6b0.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Detect Chrome either by renderer or version strings.
>
> We currently detect Chrome by GL_RENDERER. In anticipation of changes in Chrome to no longer override the renderer string we now also check the version string.
>
> Change-Id: Ice4ac3ae8ced5ac3d8fd2099300f0a3285f9c197
> Reviewed-on: https://skia-review.googlesource.com/9807
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>
>

TBR=egdaniel@google.com,bsalomon@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I0100ce266ca9bf7b71a752495e509e67ff323870
Reviewed-on: https://skia-review.googlesource.com/9811
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>