Design Documents

Start here:

Multi-process Architecture: Describes the high-level architecture of Chromium
Note: Most of the rest of the design documents assume familiarity with the concepts explained in this document.
How Chromium Displays Web Pages: Bottom-to-top overview of how WebKit is embedded in Chromium

Architecture

Process Models: Our strategies for creating new renderer processes
Conventions and patterns for multi-platform development
Inter-process Communication: How the browser, renderer, and plugin processes communicate
Threading: How to use threads in Chromium
Multi-process Resource Loading: How pages and images are loaded from the network into the renderer
Security Architecture: How Chromium's sandboxed rendering engine helps protect against malware
Extension Security Architecture: How the extension system helps reduce the severity of extension vulnerabilities
Plugin Architecture
Profile Architecture
Sandbox
Startup
SafeBrowsing

Also see the documentation for V8, which is the JavaScript engine used within Chromium.

Views framework: Our UI layout layer used on Windows/Chrome OS.
views Windowing system: How to build dialog boxes and other windowed UI using views.
Aura: Chrome's next generation hardware accelerated UI framework, and the new ChromeOS window manager built using it.
NativeControls: using platform-native widgets in views.
Focus and Activation with Views and Aura.

Chromium Print Proxy: Enables a cloud print service for legacy printers and future cloud-aware printers.
Browser Window
Info Bars
Find Bar
UI Mirroring Infrastructure: Describes the UI framework in ChromeViews that allows mirroring the browser UI in RTL locales such as Hebrew and Arabic.
UI Localization: Describes how localized strings get added to Chromium.
Constrained Popup Windows
Memory Usage Backgrounder: Some information on how we measure memory in Chromium.
DNS Prefetching: Reducing perceived latency by resolving domain names before a user tries to follow a link
Form Autofill: A feature to automatically fill out an html form with appropriate data.
Graphics:

Omnibox Autocomplete: While typing into the omnibox, Chromium searches for and suggests possible completions.

HistoryQuickProvider: Suggests completions from the user's historical site visits.

WebSocket: Enables Web applications to maintain bidirectional communications with server-side processes.
Tab to search: How to have the Omnibox automatically provide tab to search for your site.
User scripts: Information on Chromium's support for user scripts.
Extensions: Design documents and proposed APIs.
Accessibility: An outline of current (and coming) accessibility support.
Linux Resources and Localized Strings: Loading data resources and localized strings on Linux.
Tabtastic2 Requirements
Printing
Software Updates: Courgette
Sync
Desktop Notifications
Video
Geolocation: Adding support for W3C Geolocation API using native WebKit bindings.
IDN in Google Chrome
IndexedDB (early draft)
Replace the modal cookie prompt
Pepper plugin implementation
Temporary downloads
Print Preview
about:conflicts
Secure Web Proxy
Prerender
Service Processes
Multiple Profiles
Omnibox/IME Coordination
Mouse Lock
Preferences
Keyboard Event Handling

Password Generation
Site Isolation: In-progress effort to improve Chromium's process model for security between web sites.
Isolated Sites
Time Sources: Determining the time on a Chrome OS device
Sane Time: Determining an accurate time in Chrome
Installer: Registry entries and shortcuts
SafeSearch
WebNavigation API internals
Instant

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