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reillyg authored
This change adds a new class, ChooserContextBase, that stores a list of chosen objects for chooser-based permissions in website settings. It is similar to PermissionContextBase. UsbPermissionContext extends this and adds the concept of an ephemeral device permission (for devices that can't be recorded in persistent storage because they are not uniquely identifiable enough). WebUSB is the initial consumer of this new API. WebUSBPermissionProvider has been updated to check with the UsbPermissionContext and once there is a chooser UI to populate the list of allowed devices the --enable-webusb-on-any-origin flag can be removed. BUG=529950 Review URL: https://codereview.chromium.org/1382783002 Cr-Commit-Position: refs/heads/master@{#359001}
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