The optimization guide component contains code for processing hints and machine learning models received from the remote Chrome Optimization Guide Service. Optimization Guide is a layered component (https://sites.google.com/a/chromium.org/dev/developers/design-documents/layered-components-design) to enable it to be easily used on all platforms. Directory structure: core/: Shared code that does not depend on src/content/ * Contains the core functionalities to fetch and persist data received from the remote Chrome Optimization Guide Service, including but not limited to page load metadata and machine learning models. content/: Driver for the shared code based on the content layer * Contains the functionality for interpreting the data received from the remote Chrome Optimization Guide Service.