Update vscode document

docs/vscode.md

 # Use Visual Studio Code on Chromium code base
 
+[TOC]
+
 [Visual Studio Code](http://code.visualstudio.com/)
 ([Wikipedia](https://en.wikipedia.org/wiki/Visual_Studio_Code)) is a
 multi-platform code editor that is itself based on Electron which is based on 
 Chromium. Visual Studio Code has a growing community and base of installable 
 extensions and themes. It works without too much setup.
 
 ## Install extensions
 
-`ctrl+p` paste `ext install cpptools you-complete-me` then enter. 
+`ctrl+p` paste `ext install cpptools you-complete-me clang-format` then enter. 
 For more extensions: https://marketplace.visualstudio.com/search?target=vscode
 
 Highly recommend you also install your favorite keymap. 
 
 An Example to install eclipse keymaps `ext install vscode-eclipse-keybindings`. 
 You can search keymaps here. 
 https://marketplace.visualstudio.com/search?target=vscode&category=Keymaps
 
 
 ## Settings
 
 Open Settings `File/Code - Preferences - Settings` and add the following 
 settings.
 
 ```
 {
   "editor.tabSize": 2,
   "editor.rulers": [80],
-  // CPP
-  "C_Cpp.clang_format_path": "<your_depot_tools_path>/clang-format",
-  "C_Cpp.clang_format_fallbackStyle": "Chromium",
   // Exclude
   "files.exclude": {
     "**/.git": true,
     "**/.svn": true,
     "**/.hg": true,
     "**/.DS_Store": true,
     "**/out": true
   },
   // YCM
   "ycmd.path": "<your_ycmd_path>",
   "ycmd.global_extra_config": 
       "<your_chromium_path>/src/tools/vim/chromium.ycm_extra_conf.py",
   "ycmd.confirm_extra_conf": false,
-  "ycmd.use_imprecise_get_type": true
+  "ycmd.use_imprecise_get_type": true,
+  // clang-format

[Nico, 2017/03/03 15:58:34]

same comment here as in https://codereview.chromium.org/2687733003/#msg11 (in
other words, the previous instructions where a bit better in this regard)

+  "clang-format.style": "Chromium",
+  "editor.formatOnSave": true
 }
 ```
 
 ### Install auto-completion engine(ycmd)
 
 ```
 $ git clone https://github.com/Valloric/ycmd.git ~/.ycmd
 $ cd ~/.ycmd
 $ ./build.py --clang-completer
 ```
 
 ## Work flow
 
 1. `ctrl+p` open file.
-2. `ctrl+shift+o` goto symbol. `ctrl+l` goto line.
+2. `ctrl+o` goto symbol. `ctrl+l` goto line.
 3. <code>ctrl+`</code> toggle terminal.
 
 ## Tips
 
 ### On laptop
 
-Because we use ycmd to enable auto completion. we can disable CPP autocomplete 
-to save battery. `"C_Cpp.autocomplete": "Disabled"`
+Because we use ycmd to enable auto completion. We can disable CPP autocomplete 
+and index to save battery. 
+
+```
+"C_Cpp.autocomplete": "Disabled",
+"C_Cpp.addWorkspaceRootToIncludePath": false
+```
+
+### Enable Sublime-like minimap
+
+```
+"editor.minimap.enabled": true,
+"editor.minimap.renderCharacters": false
+```
 
 ### More
 
 https://github.com/Microsoft/vscode-tips-and-tricks/blob/master/README.md