This directory contains GN templates and code for Chrome-specific Android app bundles and dynamic feature modules. Among others, it offers the following:
A list of descriptors for all modules packaged into the Chrome bundles in chrome_feature_modules.gni.
A GN template to instantiate a Chrome-specific module in chrome_feature_module_tmpl.gni. It wraps an android_app_bundle_module and adds things like multi ABI (e.g. 64 bit browser and 32 bit WebView) and auto-generated Java module descriptors (see here for more details).
A GN template to instantiate a Chrome-specific bundle in chrome_bundle_tmpl.gni. It instantiates a chrome_feature_module for each passed module descriptors as well as an android_app_bundle.
A subfolder for each module containing module-specific code such as module interfaces and providers.