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ae71cba030
The FIDL service `fuchsia.intl.PropertyProvider` is a service that
the flutter runner can use to obtain information on system preferred
locales.
This change sends a platform message "setLocale" on the channel
"flutter/localization", based on the values provided by the above
mentioned FIDL service.
Credit: most of this was initially written by @kpozin; I ported it
to out-of-tree flutter engine.
Tested:
1. Compile and publish the unit tests package as shown in
the script below.
2. In a Fuchsia repository (pointed to by `$FUCHSIA_DIR`), run
`fx serve`
3. `fx shell run fuchsia-pkg://fuchsia.com/flutter_runner_tests#meta/flutter_runner_tests.cmx`
The script used to update the unit tests.
```bash
set -x
FLUTTER_ENGINE_DIR="${FLUTTER_ENGINE_DIR:-$HOME/fx/flutter/engine/src}"
readonly OUT_DIR="${FLUTTER_ENGINE_DIR}/out"
(
cd ${FLUTTER_ENGINE_DIR}
./flutter/tools/gn --fuchsia --fuchsia-cpu x64 --unoptimized
ninja -j 100 -C "${OUT_DIR}/fuchsia_debug_unopt_x64"
cp "${OUT_DIR}/compile_commands.json" "${FLUTTER_ENGINE_DIR}"
echo "Publishing the tests package"
"${FLUTTER_ENGINE_DIR}/fuchsia/sdk/linux/tools/pm" publish \
-a -r $FUCHSIA_DIR/out/release/amber-files \
-f "${FLUTTER_ENGINE_DIR}/out/fuchsia_debug_unopt_x64/flutter_runner_tests-0.far"
)
```