This directory is for components that have the Content Module as the uppermost layer they depend on. They may depend only on the Content API (content/public) and on lower layers (e.g. base/, net/, ipc/ etc.). These components are not part of the Content Module itself. They are built in a separate .gyp file (content_components.gyp in this directory). Components that have bits of code that need to live in different processes (e.g. some code in the browser process, some in the renderer process, etc.) should separate the code into different subdirectories. Hence for a component named 'foo' you might end up with a structure like the following: content/components/foo - DEPS, OWNERS, foo.gypi content/components/foo/browser - code that needs the browser process content/components/foo/common - for e.g. IPC constants and such content/components/foo/renderer - code that needs renderer process These subdirectories should have DEPS files with the relevant restrictions in place, e.g. only content/components/foo/browser should be allowed to #include from content/public/browser. Note that there may also be an 'android' subdir, with a Java source code structure underneath it where the package name is org.chromium.content.component.foo, and with subdirs after 'foo' to illustrate process, e.g. 'browser' or 'renderer': content/components/foo/android/OWNERS, DEPS content/components/foo/android/java/src/org/chromium/content/component/foo/browser/ content/components/foo/android/javatests/src/org/chromium/content/component/foo/browser/ Code in content/components/ should be placed in the content:: namespace.