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This CL enables obtaining a finer control for OS hooks supported by
OSIntegrationManager::InstallOsHooks().

Currently, there is no option for file handlers and
file_handler_manager_->EnableAndRegisterOsFileHandlers()
is being called every time InstallOsHooks() is executed.

This CL adds the bitset OsHookType to InstallOsHooksOptions struct to
allow controlling which OS Hooks to install, including file handlers.

bool add_to_application_menu now becomes
os_hooks[OsHookType::kShortcuts].

bool run_on_os_login now becomes os_hooks[OsHookType::kRunOnOsLogin].

Bug: 1087219
Change-Id: Ib370c394235efe66fca23267928184b9841c76ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373229
Commit-Queue: Carlos Frias <carlos.frias@microsoft.com>
Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Reviewed-by: Alexey Baskakov <loyso@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807509}