Revert "Use simple buffers instead of vectors"

This reverts commit b188da121c1575caa6b0b9755e3f80a6b5e44611.

Reason for revert: Patch on a rollback

Original change's description:
> Use simple buffers instead of vectors
> 
> Start using simple buffers, these will be used for
> multiple runs latter on.
> 
> Change-Id: I8dadbed036b7a60d708c49b84bb5e3bb3710f704
> Reviewed-on: https://skia-review.googlesource.com/140578
> Reviewed-by: Mike Klein <mtklein@google.com>
> Commit-Queue: Herb Derby <herb@google.com>

TBR=mtklein@google.com,herb@google.com

Change-Id: I51d9ad9bc0fd7efb93e5db4dc504d8dc31e7cfb4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/140802
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
5 files changed