Chris Bracken 459f722b86 Revert "Use iOS scale when computing render buffer size (#4171)" (#4175)
This reverts commit d43d35347594c893687dec7402a525d83f57db10.

Clear regression to the flutter_gallery_ios__transition_perf benchmarks:
  * average_frame_build_time_millis: 1.4x
  * missed_frame_build_budget_count: 1.2x

No regression seen for other iOS benchmarks (e.g. scrolling).
2017-10-04 17:42:46 -07:00
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