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We use SystemParametersInfo to get the current system scroll wheel settings when we process scrollwheel movement in the content process. We need to remove SystemParametersInfo for sandboxing the content process so this code changes the plugin behavior to cache the system wheel settings. We do this by 1) sending wheel settings to the plugin whenever a plugin takes focus and 2) forwarding wheel settings update messages from Windows to the currently focused plugin. Differential Revision: https://phabricator.services.mozilla.com/D47938 --HG-- extra : moz-landing-system : lando |
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