Chris Bracken 4f108b7be1 Revert "Improve C++ plugin lifetime handling (#17489)" (flutter/engine#17563)
Seems to have triggered flaky failures on the Windows bot since landing.
Example failure:

    [ RUN      ] PluginRegistrarTest.ManagerRemovesOnDestruction
    c:\b\s\w\ir\cache\builder\src\flutter\shell\platform\common\cpp\client_wrapper\plugin_registrar_unittests.cc(149): error: Expected: (manager->GetRegistrar<PluginRegistrar>(dummy_registrar_handle)) != (first_wrapper), actual: 000002400A90E3D0 vs 000002400A90E3D0

This reverts commit 478a7855943d81a58dd9e9037fb338d3a18bb294.
2020-04-07 10:22:55 -07:00
..