Chrome Platform Services

Overview

This directory contains Chrome Platform Services. If you think of Chrome as a “portable OS,” Chrome Platform Services can be thought of as that OS' “system services”.

Roughly each subdirectory here corresponds to a service that:

• is a client of //services/shell with its own unique Identity.
• could logically run a standalone process for security/performance isolation benefits depending on the constraints of the host OS.

Service Directory Structure

Individual services are structured like so:

//services/foo/                   <-- Implementation code, may have subdirs.
              /public/    
                     /cpp/        <-- C++ client libraries (optional)
                     /interfaces/ <-- Mojom interfaces

Dependencies

Code within //services may only depend on each other via each other's /public/ directories, i.e. implementation code cannot be shared directly.

Service code should also take care to tightly limit the dependencies on static libraries from outside of //services. Dependencies to large platform layers like //content, //chrome or //third_party/WebKit must be avoided.

Physical Packaging

Note that while it may be possible to build a discrete physical package (DSO) for each service, products consuming these services may package them differently, e.g. by combining them into a single package.