Add a categorized document index to docs/README.md.

docs/README.md

 # Chromium docs
 
 This directory contains chromium project documentation in
-[Gitiles-flavored Markdown].
+[Gitiles-flavored Markdown](https://gerrit.googlesource.com/gitiles/+/master/Documentation/markdown.md).
 It is automatically
 [rendered by Gitiles](https://chromium.googlesource.com/chromium/src/+/master/docs/).
 
+If you add new documents, please also add a link to them in the Document Index
+below.
+
+[TOC]
+
 ## Style guide
 
-Markdown documents must follow the [style guide].
+Markdown documents must follow the [style guide](https://github.com/google/styleguide/tree/gh-pages/docguide).
 
 ## Previewing changes
 
-You can preview your local changes using [md_browser]:
+You can preview your local changes using [md_browser](../tools/md_browser/):
 
 ```bash
 # in chromium checkout
 ./tools/md_browser/md_browser.py
 ```
 
 To review someone else's changes, apply them locally first:
 
 ```bash
 # in chromium checkout
 git cl patch <CL number or URL>
 ./tools/md_browser/md_browser.py
 ```
 
-[Gitiles-flavored Markdown]: https://gerrit.googlesource.com/gitiles/+/master/Documentation/markdown.md
-[style guide]: https://github.com/google/styleguide/tree/gh-pages/docguide
-[md_browser]: ../tools/md_browser/
+## Document Index
+
+### Checking Out and Building
+*   [Linux Build Instructions](linux_build_instructions.md) - Linux
+*   [Mac Build Instructions](mac_build_instructions.md) - MacOS
+*   [Windows Build Instructions](windows_build_instructions.md) - Windows
+*   [Android Build Instructions](android_build_instructions.md) - Android target
+    (on a Linux host)
+*   [Cast Build Instructions](linux_cast_build_instructions.md) - Cast target
+    (on a Linux host)
+*   [Cast for Android Build Instructions](android_cast_build_instructions.md) -
+    Cast for Android (on a Linux host)
+*   [iOS Build Instructions](ios/build_instructions.md) - iOS target (on a MacOS
+    host)
+*   [Linux Chromium ARM Recipes](linux_chromium_arm.md) - Recipes for building
+    Chromium for ARM on Linux.
+*   [Common Build Tasks](common_build_tasks.md) - Recipes for slightly more
+    advanced build tasks
+*   [Chrome Component Build](component_build.md) - Faster builds using more
+    libraries
+*   [Using the BuildRunner](using_build_runner.md) - Scripts that extract build
+    stops from builders and runs them locally on a slave
+*   [Cr User Manual](cr_user_manual.md) - Manual for `cr`, a tool that tries to
+    hide some of the tools used for working on Chromium behind an abstraction
+    layer
+
+### Integrated Development Environment (IDE) Set Up Guides
+*   [Android Studio](android_studio.md) - Android Studio for Android builds
+*   [Eclipse for Android](eclipse.md) - Eclipse for Android
+*   [Eclipse for Linux](linux_eclipse_dev.md) - Eclipse for other platforms
+    (This guide was written for Linux, but is probably usable on Windows/MacOS
+    as well)
+*   [Qt Creator](qtcreator.md) - Using Qt Creator as an IDE or GUI debugger
+*   [Setting up Visual Studio Code](vscode.md) - Visual Studio Code
+*   [EMACS Notes](emacs.md) - EMACS commands/styles/tool integrations
+*   [Atom](atom.md) - Atom multi-platform code editor
+
+### Git
+*   [Git Cookbook](git_cookbook.md) - A collection of git recipes for common
+    tasks
+*   [Git Tips](git_tips.md) - More git tips
+
+### Clang
+*   [Clang Compiler](clang.md) - General information on the clang compiler, used
+    by default on Mac and Linux
+*   [Clang Tool Refactoring](clang_tool_refactoring.md) - Leveraging clang tools
+    to perform refactorings that are AST-aware
+*   [The Clang Static Analyzer](clang_static_analyzer.md) - How to enable static
+    analysis at build time
+*   [Writing Clang Plugins](writing_clang_plugins.md) - Don't write a clang
+    plugin, but if you do, read this
+*   [Updating Clang](updating_clang.md) - Updating the version of Clang used to
+    build
+*   [Using clang-format on Chromium C++ Code](clang_format.md) - Various ways to
+    invoke clang-format on C++ code
+*   [Clang Tidy](clang_tidy.md) - Support for the `clang-tidy` tool in Chromium
+*   [Updating Clang Format Binaries](updating_clang_format_binaries.md) - How up
+    update the clang-format binaries that come with a checkout of Chromium
+
+### General Development
+*   [Code Reviews](code_reviews.md) - Code review requirements and guidelines
+*   [Closure Compilation](closure_compilation.md) - The _Closure_ JavaScript
+    compiler
+*   [Callback<> and Bind()](callback.md) - All about Callbacks, Closures, and
+    Bind().
+*   [Views Platform Styling](ui/views/platform_style.md) - How views are styled
+    to fit in different native platforms
+*   [Tab Helpers](tab_helpers.md) - Using WebContents/WebContentsObserver to add
+    features to browser tabs.
+*   [Adding third_party Libraries](adding_to_third_party.md) - How to get code
+    into third_party/
+*   [Graphical Debugging Aid for Chromium Views](graphical_debugging_aid_chromium_views.md) -
+    Visualizing view trees during debugging
+*   [Bitmap Pipeline](bitmap_pipeline.md) - How bitmaps are moved from the
+    renderer to the screen.
+*   [base::Optional](optional.md) - How to use `base::Optional` in C++ code.
+*   [Using the Origin Trials Framework](origin_trials_integration.md) - A
+    framework for conditionally enabling experimental APIs for testing.
+*   [`SharedModelTypeProcessor` in Unified Sync and Storage](sync/uss/shared_model_type_processor.md) -
+    Notes on the central data structure used in Chrome Sync.
+*   [Chrome Sync's Model API](sync/model_api.md) - Data models used for syncing
+    information across devices using Chrome Sync.
+*   [Ozone Overview](ozone_overview.md) - Ozone is an abstraction layer between
+    the window system and low level input and graphics.
+*   [Optimizing Chrome Web UIs](optimizing_web_uis.md) - Notes on making webuis
+    more performant
+*   [ES6 Support in Chromium](es6_chromium.md) - Implementation of ECMAScript6
+    features in Chromium
+
+### Testing
+*   [Running and Debugging Layout Tests](testing/layout_tests.md)
+*   [Writing Layout Tests](testing/writing_layout_tests.md) - Layout Tests using
+    `content_shell`
+*   [Layout Test Expectations and Baselines](testing/layout_test_expectations.md) -
+    Setting expected results of layout tests.
+*   [Layout Tests Tips](testing/layout_tests_tips.md) - Best practices for Layout
+    Tests
+*   [Layout Tests with Manual Fallback](testing/layout_tests_with_manual_fallback.md) -
+    Writing tests that simulate manual interventions
+*   [Extending the Layout Test Framework](how_to_extend_layout_test_framework.md)
+*   [Fixing Layout Test Flakiness](testing/identifying_tests_that_depend_on_order.md) -
+    Diagnosing and fixing layout test flakiness due to ordering dependencies.
+*   [Running Layout Tests using `content_shell`](testing/layout_tests_in_content_shell.md) -
+    Running layout tests by hand.
+*   [Testing Browser Dialogs](testing/test_browser_dialog.md) - Using
+    TestBrowserDialog
+*   [Web Platform Tests](testing/web_platform_tests.md) - Shared tests across
+    browser vendors
+*   [Using Breakpad with `content_shell`](testing/using_breakpad_with_content_shell.md) -
+    Capture stack traces on layout test crashes without an attached debugger
+*   [Test Descriptions](test_descriptions.md) - Unit test targets that can be
+    built, with associated desciptions.
+*   [IPC Fuzzer](ipc_fuzzer.md) - Fuzz testing of Chromium IPC interfaces.
+
+### Misc Linux-Specific Docs
+*   [Linux Proxy Config](linux_proxy_config.md) - Network proxy sources on Linux
+*   [Debugging SSL on Linux](linux_debugging_ssl.md) - Tips on debugging SSL
+    code in Linux
+*   [Linux Cert Managment](linux_cert_management.md) - Managing X.509
+    Certificates in Linux
+*   [Tips for Debugging on Linux](linux_debugging.md)
+*   [Linux GTK Theme Integration](linux_gtk_theme_integration.md) - Having
+    Chrome match the GTK+ theme.
+*   [Gtk vs ViewsGtk](gtk_vs_views_gtk.md) - Notes on when to use Gtk vs
+    ViewsGtk
+*   [Browser Plugins on Linux](linux_plugins.md) - A collection of links to
+    information on how browser plugins work on Linux
+*   [Linux Crash Dumping](linux_crash_dumping.md) - How Breakpad uploads crash
+    reports to Google crash servers.
+*   [Linux Minidump to Core](linux_minidump_to_core.md) - How to convert a
+    Breakpad-generated minidump files to a core file readable by most debuggersx
+*   [Linux Sandbox IPC](linux_sandbox_ipc.md) - The lower level UPC system used
+    to route requests from the bottom of the call stack up into the browser.
+*   [Linux Dev Build as Default Browser](linux_dev_build_as_default_browser.md) -
+    How to configure a Dev build of Chrome as the default browser in Linux.
+*   [Linux Chromium Packages](linux_chromium_packages.md) - Packages of Chromium
+    browser (not Chrome) provided by some Linux distributions.
+*   [`seccomp` Sandbox Crash Dumping](seccomp_sandbox_crash_dumping.md) - Notes
+    on crash dumping a process running in a seccomp sandbox.
+*   [Linux Password Storage](linux_password_storage.md) - Keychain integrations
+    between Chromium and Linux.
+*   [Linux Sublime Development](linux_sublime_dev.md) - Using Sublime as an IDE
+    for Chromium development on Linux.
+*   [Building and Debugging GTK](linux_building_debug_gtk.md) - Building
+    Chromium against GTK using lower optimization levels and/or more debugging
+    symbols.
+*   [Debugging GTK](linux_debugging_gtk.md) - Using the GTK Debug packages and
+    related tools.
+*   [Chroot Notes](using_a_linux_chroot.md) - Setting up a chroot to work around
+    libfreetype differences in some versions of Linux.
+*   [Linux Sandboxing](linux_sandboxing.md) - The Linux multi-process model to
+    isolate browser components with different privileges.
+*   [Zygote Process](linux_zygote.md) - How the Linux Zygote process, used to
+    spawn new processes, works.
+*   [Running Layout Tests on Linux](layout_tests_linux.md) - Linux-specific
+    instructions for running layout tests.
+*   [Linux Sysroot Images](linux_sysroot.md) - How builds use libraries on Linux
+*   [`msttcorefonts` on Mandriva](mandriva_msttcorefonts.md) - Getting fonts
+    needed to build Chrome that are not available for Mandriva
+*   [Linux Hardware Video Decoding](linux_hw_video_decode.md) - Enabling
+    hardware video decode codepaths on Linux
+
+### Misc MacOS-Specific Docs
+*   [Using CCache on Mac](ccache_mac.md) - Speed up builds on Mac using ccache
+    with clang/ninja
+*   [Cocoa tips and tricks](cocoa_tips_and_tricks.md) - A collection of idioms
+    used when writing Cocoa views and controllers
+*   [MacViews Release Plan](ui/views/macviews_release.md)
+
+### Misc Windows-Specific Docs
+*   [Handling cygwin rebaseall failures](cygwin_dll_remapping_failure.md)
+*   [Hacking on ANGLE in Chromium](angle_in_chromium.md) - OpenGL ES 2.0 built
+    on top of DirectX
+*   [Retrieveing Code Analysis Warnings](retrieving_code_analysis_warnings.md) -
+    How to retrieve and summarize the warnings generated by Microsoft VC++'s
+    `/analyze` compile option.
+*   [Windows Split DLLs](windows_split_dll.md) - Splitting `chrome.dll` into
+    multiple dlls to work around toolchain limitations on Windows.
+
+### Misc Android-Specific Docs
+*   [Google Play Services in Chrome for Android](google_play_services.md)
+*   [Accessing C++ Enums in Java](android_accessing_cpp_enums_in_java.md) - How
+    to use C++-defined enums in Java code
+*   [Profiling Content Shell on Android](profiling_content_shell_on_android.md) -
+    Setting up profiling for `content_shell` on Android
+*   [Working Remotely with Android](working_remotely_with_android.md) - Building
+    on a remote machine for an Android device connected to your local machine
+*   [Using FindBugs for Android](use_find_bugs_for_android.md) - Using the open
+    source static analysis tool findbugs on the Java code.
+*   [Android Test Instructions](android_test_instructions.md) - Running a build
+    on an Android device or emulator.
+*   [Android Debugging](android_debugging_instructions.md) - Tools and tips for
+    how to debug Java and/or C/C++ code running on Android.
+*   [Android Logging](android_logging.md) - How Chrome's logging API works with
+    `android.util.Log` on Android, and usage guidelines.
+*   [Chromoting Android Hacking](chromoting_android_hacking.md) - Viewing the
+    logs and debugging the Chrome Remote Desktop Android client.
+
+### Misc iOS-Specific Docs
+*   [Continuous Build and Test Infrastructure for Chromium for iOS](ios/infra.md)
+*   [Opening linux in Chrome for iOS](ios/opening_links.md) - How to have your

[Dirk Pranke, 2017/04/13 23:53:22]

s/linux/links ?

[Carlson, 2017/04/14 00:18:22]

Done.

+    iOS app open links in Chrome.
+*   [User Agent in Chrome for iOS](ios/user_agent.md) - Notes on User Agent
+    strings using Chrome for iOS.
+
+### Media
+*   [Audio Focus Handling](media/audio_focus.md) - How multiple MediaSession
+    audio streams interact
+*   [Autoplay of HTMLMediaElements](media/autoplay.md) - How HTMLMediaElements
+    are autoplayed.
+*   [Piranha Plant](piranha_plant.md) - Future architecture of MediaStreams
+
+### Accessibility
+*   [Accessibility Overview](accessibility/overview.md) - Overview of
+    accessibility concerns and approaches in Chromium.
+*   [Accessibility Tests](accessibility/tests.md) - Where to find
+    accessibility-related tests in the codebase.
+*   [ChromeVox on Chrome OS](accessibility/chromevox.md) - Enabling spoken
+    feedback (ChromeVox) on Chrome OS.
+*   [ChromeVox on Desktop Linux](accessibility/chromevox_on_desktop_linux.md) -
+    Enabling spoken feedback (ChromeVox) on desktop Linux.
+*   [BRLTTY in Chrome OS](accessibility/brltty.md) - Chrome OS integration with
+    BRLTTY to support refreshable braille displays
+*   [PATTS on Chrome OS](accessibility/patts.md) - Notes on the PATTS speech
+    sythesis engine used on Chrome OS
+*   [VoiceOver](ios/voiceover.md) - Using Apple's VoiceOver feature with
+    Chromium on iOS.
+
+### Memory Infrastructure Timeline Profiling (MemoryInfra)
+*   [Overview](memory-infra/README.md)
+*   [GPU Profiling](memory-infra/probe_gpu.md)
+*   [Adding Tracing to a Component](adding_memory_infra_tracing.md)
+*   [Enabling Startup Tracing](memory-infra/memory_infra_startup_tracing.md)
+*   [Memory Usage in CC](memory-infra/probe-cc.md)
+*   [Memory Benchmarks](memory-infra/memory_benchmarks.md)
+*   [Heap Profiling](memory-infra/heap_profiler.md)
+*   [Heap Profiling Internals](memory-infra/heap_profiler_internals.md)
+
+### Misc
+*   [Useful URLs](useful_urls.md) - A collection of links to various tools and
+    dashboards
+*   [ERC IRC](erc_irc.md) - Using ERC in EMACS to access IRC
+*   [Kiosk Mode](kiosk_mode.md) - Simulating kiosk mode.
+*   [User Handle Mapping](user_handle_mapping.md) - Names of developers across
+    Chromium/IRC/Google
+*   [Documentation Best Practices](documentation_best_practices.md)
+*   [Documentation Guidelines](documentation_guidelines.md)
+*   [Shift-Based Development](shift_based_development.md) - An experiment in
+    handing off development of coordinated work between developers in different
+    time zones.
+*   [Chromium Browser vs Google Chrome](chromium_browser_vs_google_chrome.md) -
+    What's the difference between _Chromium Browser_ and _Google Chrome_?
+*   [Proxy Auto Config using WPAD](proxy_auto_config.md) - How WPAD servers are
+    used to automatically set proxy settings.
+*   [Installing Chromium OS on VMWare](installation_at_vmware.md) - How to
+    install Chromium OS on VMWare.
+
+### Probably Obsolete
+*   [Old ChromeOS build instructions](old_chromeos_build_instructions.md)
+*   [TPM Quick Reference](tpm_quick_ref.md) - Trusted Platform Module notes.
+*   [System Hardening Features](system_hardening_features.md) - A list of
+    current and planned Chrome OS security features.
+*   [Browser View Resizer](browser_view_resizer.md) - Design doc for making
+    browser window resizing easier on Windows.
+*   [WebView Policies](webview_policies.md)
+*   [Linux Profiling](linux_profiling.md) - How to profile Chromium on Linux
+*   [Linux Graphics Pipeline](linux_graphics_pipeline.md)
+*   [Linux `SUID` Sandbox](linux_suid_sandbox.md) - Sandboxing renderers using a
+    SUID binary on Linux
+*   [Linux `SUID` Sandbox Development](linux_suid_sandbox_development.md) -
+    Development on the above system.
+*   [Linux PID Namespace Support](linux_pid_namespace_support.md)
+*   [Vanilla msysgit workflow](vanilla_msysgit_workflow.md) - A workflow for
+    using mostly vanilla git on Windows.
+*   [Old Chromoting Build Instructions](old_chromoting_build_instructions.md)
+*   [Old Options](chrome_settings.md) - Pre-Material Design chrome://settings
+    notes.