Michael Klimushyn 791c5441a5 Revert "Turn on RasterCache based on view hierarchy (#13360)" (flutter/engine#13442)
This caused EmbedderTest.VerifyB143464703 to fail after merging into
master.

```
../../flutter/shell/platform/embedder/tests/embedder_unittests.cc:3111: Failure
Value of: ImageMatchesFixture("verifyb143464703.png", renderered_scene)
  Actual: false
Expected: true
[  FAILED  ] EmbedderTest.VerifyB143464703 (2507 ms)
```

This reverts commit b1479f8e6075ef95d6b11a03e318bff72a2c0288.
2019-10-30 11:25:29 -07:00
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