Vulcanize MD History to improve page-load performance

chrome/browser/resources/md_downloads/vulcanize_readme.md

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-# Vulcanizing Material Design downloads
-
-`vulcanize` is an npm module used to combine resources.  In order to make the
-Material Design downloads page sufficiently fast, we run vulcanize on the source
-files to combine them and reduce blocking load/parse time.
-
-## Required software
-
-Vulcanization currently requires:
-
-- node.js: >= v4.4.2 (can be found with `node --version`)
-- npm: >= 1.3.10 (can be found with `npm --version`)
-- vulcanize: 1.14.8 (can be found with `vulcanize --version`)
-- crisper: 2.0.1 (can be found with `npm list -g crisper`)
-
-## Installing required software
-
-For instructions on installing node and npm, see
-[here](https://docs.npmjs.com/getting-started/installing-node).
-
-We recommend telling npm where to store downloaded modules:
-
-```bash
-$ npm config set -g prefix "$HOME/node_modules"
-```
-
-Then install `crisper` and `vulcanize` like this:
-
-```bash
-$ npm install -g crisper vulcanize
-```
-
-Ultimately, all that is required to run this script is that `crisper` and
-`vulcanize` are on your `$PATH`.
-
-## Combining resources with vulcanize
-
-To combine all the CSS/HTML/JS for the downloads page to make it production
-fast, you can run the commands:
-
-```bash
-$ chrome/browser/resources/md_downloads/vulcanize.py  # from src/
-```
-
-This should overwrite the following files:
-
-- chrome/browser/resources/md_downloads/
- - vulcanized.html (all <link rel=import> and stylesheets inlined)
- - crisper.js (all JavaScript, extracted from vulcanized.html)
-
-## Testing downloads without vulcanizing
-
-Build with "use_vulcanize=0" in your GYP_DEFINES to build downloads without
-vulcanizing.