//components/safe_browsing is a layered component (https://sites.google.com/a/chromium.org/dev/developers/design-documents/layered-components-design) to enable it to be shared cleanly on iOS.

The component has the following structure:

• core/: shared code that does not depend on either {src/content, src/ios} or {./content, ./ios}
  • browser/: Browser process code
  • common/: Code shared by the browser and the renderer (on platforms other than iOS)
• content/: non-iOS code layered above core/ that integrates with the Content API
  • browser/: Browser process code
  • common/: Code shared by the browser and the renderer
  • renderer/: Renderer process code
• ios/: iOS-specific code layered above core/ that integrates with //ios/web

A note for //content-based embedders of this component:

//content-based embedders should use the SafeBrowsingBlockingPage, SafeBrowsingUIManager, and SafeBrowsingNavigationThrottle classes. BaseBlockingPage and BaseUIManager exist for Android WebView and should not be used further (crbug.com/1234027).