resources: remove most uses of GetResourcePath()

Going forward, we will standardize on GetResourceAsData(), which will
make it easier to run tests in environments without access to the
filesystem.

Also: GetResourceAsData() complains when a resource is missing.
This is usually an error.

Change-Id: Iaf70b71b0ca5ed8cd1a5538a60ef185ae8736188
Reviewed-on: https://skia-review.googlesource.com/82642
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
16 files changed