Update old links to point to dart.dev and pub.dev (#283)

Also deleted BIG blocks discussing polymer, pub serve, transformers,
Dartium, etc
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 265b537..51bdce8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -77,7 +77,7 @@
   ```
 
 [strikethrough]: https://github.github.com/gfm/#strikethrough-extension-
-[pub-global]: https://www.dartlang.org/tools/pub/cmd/pub-global#running-a-script-from-your-path
+[pub-global]: https://dart.dev/tools/pub/cmd/pub-global#running-a-script-from-your-path
 
 ## 1.1.1
 
diff --git a/README.md b/README.md
index 4bc9e9e..44884bb 100644
--- a/README.md
+++ b/README.md
@@ -141,4 +141,4 @@
 [CommonMark source]: https://github.com/jgm/CommonMark/
 [pandoc-auto_identifiers]: http://pandoc.org/README.html#extension-auto_identifiers
 ["Markdown's XSS Vulnerability (and how to mitigate it)"]: https://github.com/showdownjs/showdown/wiki/Markdown%27s-XSS-Vulnerability-(and-how-to-mitigate-it)
-[NodeValidator]: https://api.dartlang.org/stable/latest/dart-html/NodeValidator-class.html
+[NodeValidator]: https://api.dart.dev/stable/dart-html/NodeValidator-class.html
diff --git a/benchmark/input.md b/benchmark/input.md
index 4787323..eeb55b1 100644
--- a/benchmark/input.md
+++ b/benchmark/input.md
@@ -193,30 +193,6 @@
 For example, if you wanted to run a test on every browser but Chrome, you would
 write `@TestOn("browser && !chrome")`.
 
-### Running Tests on Dartium
-
-Tests can be run on [Dartium][] by passing the `-p dartium` flag. If you're
-using the Dart Editor, the test runner will be able to find Dartium
-automatically. On Mac OS, you can also [install it using Homebrew][homebrew].
-Otherwise, make sure there's an executable called `dartium` (on Mac OS or Linux)
-or `dartium.exe` (on Windows) on your system path.
-
-[Dartium]: https://www.dartlang.org/tools/dartium/
-[homebrew]: https://github.com/dart-lang/homebrew-dart
-
-Similarly, tests can be run on the headless Dartium content shell by passing `-p
-content-shell`. The content shell is installed along with Dartium when using
-Homebrew. Otherwise, you can downloaded it manually [from this
-page][content_shell]; if you do, make sure the executable named `content_shell`
-(on Mac OS or Linux) or `content_shell.exe` (on Windows) is on your system path.
-
-[content_shell]: http://gsdview.appspot.com/dart-archive/channels/stable/release/latest/dartium/
-
-[In the future][issue 63], there will be a more explicit way to configure the
-location of both the Dartium and content shell executables.
-
-[issue 63]: https://github.com/dart-lang/test/issues/63
-
 ## Asynchronous Tests
 
 Tests written with `async`/`await` will work automatically. The test runner
@@ -448,55 +424,3 @@
 If multiple platforms match, the configuration is applied in order from first to
 last, just as they would in nested groups. This means that for configuration
 like duration-based timeouts, the last matching value wins.
-
-## Testing With `barback`
-
-Packages using the `barback` transformer system may need to test code that's
-created or modified using transformers. The test runner handles this using the
-`--pub-serve` option, which tells it to load the test code from a `pub serve`
-instance rather than from the filesystem.
-
-Before using the `--pub-serve` option, add the `test/pub_serve` transformer to
-your `pubspec.yaml`. This transformer adds the necessary bootstrapping code that
-allows the test runner to load your tests properly:
-
-```yaml
-transformers:
-- test/pub_serve:
-    $include: test/**_test{.*,}.dart
-```
-
-Note that if you're using the test runner along with [`polymer`][polymer], you
-have to make sure that the `test/pub_serve` transformer comes *after* the
-`polymer` transformer:
-
-[polymer]: https://www.dartlang.org/polymer/
-
-```yaml
-transformers:
-- polymer
-- test/pub_serve:
-    $include: test/**_test{.*,}.dart
-```
-
-Then, start up `pub serve`. Make sure to pay attention to which port it's using
-to serve your `test/` directory:
-
-```shell
-$ pub serve
-Loading source assets...
-Loading test/pub_serve transformers...
-Serving my_app web on http://localhost:8080
-Serving my_app test on http://localhost:8081
-Build completed successfully
-```
-
-In this case, the port is `8081`. In another terminal, pass this port to
-`--pub-serve` and otherwise invoke `pub run test:test` as normal:
-
-```shell
-$ pub run test:test --pub-serve=8081 -p chrome
-"pub serve" is compiling test/my_app_test.dart...
-"pub serve" is compiling test/utils_test.dart...
-00:00 +42: All tests passed!
-```
diff --git a/example/app.dart b/example/app.dart
index 9d11bf7..9244692 100644
--- a/example/app.dart
+++ b/example/app.dart
@@ -13,7 +13,7 @@
 final introText = r'''Markdown is the **best**!
 
 * It has lists.
-* It has [links](http://dartlang.org).
+* It has [links](http://dart.dev).
 * It has _so much more_...''';
 
 // Flavor support.
diff --git a/example/style.css b/example/style.css
index 4d3d31a..bfacfb0 100644
--- a/example/style.css
+++ b/example/style.css
@@ -50,7 +50,7 @@
 .toolbar {
   /* Styled like Material Toolbar. */
   align-items: center;
-  background-color: #22d3c5; /* Taken from webdev.dartlang.org. */
+  background-color: #22d3c5;
   box-sizing: border-box;
   color: rgba(0, 0, 0, 0.87);
   display: flex;
@@ -102,7 +102,7 @@
 }
 
 textarea:focus {
-  border-color: #22d3c5; /* Taken from webdev.dartlang.org. */
+  border-color: #22d3c5;
   border-width: 0 0 2px;
   outline: 0;
   padding-bottom: 0;
diff --git a/pubspec.yaml b/pubspec.yaml
index 2d53c0e..3d67ea0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,7 +2,6 @@
 version: 2.1.4-dev
 
 description: A library for converting markdown to HTML.
-author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/markdown
 
 executables: