Add names and plain_names fields.

doc/package_config.md

 Each package may include a configuration file that applies to the package as a
 whole. This file can be used to provide custom defaults for various options, to
 define configuration for multiple files, and more.
 
 The file is named `dart_test.yaml` and lives at the root of the package, next to
 the package's pubspec. Like the pubspec, it's a [YAML][] file. Here's an
 example:
 
 [YAML]: http://yaml.org/
 
@@ skipping 15 matching lines @@
 
 * [Test Configuration](#test-configuration)
   * [`timeout`](#timeout)
   * [`verbose_trace`](#verbose_trace)
   * [`js_trace`](#js_trace)
   * [`skip`](#skip)
   * [`test_on`](#test_on)
 * [Runner Configuration](#runner-configuration)
   * [`paths`](#paths)
   * [`filename`](#filename)
+  * [`names`](#names)
+  * [`plain_names`](#plain_names)
   * [`platforms`](#platforms)
   * [`concurrency`](#concurrency)
   * [`pub_serve`](#pub_serve)
   * [`reporter`](#reporter)
 * [Configuring Tags](#configuring-tags)
   * [`tags`](#tags)
   * [`add_tags`](#add_tags)
 * [Configuring Platforms](#configuring-platforms)
   * [`on_os`](#on_os)
   * [`on_platform`](#on_platform)
@@ skipping 128 matching lines @@
 This supports the full [glob syntax][]. However, since it's only compared
 against a path's basename, path separators aren't especially useful. It defaults
 to `"*_test.dart"`.
 
 ```yaml
 filename: "test_*.dart"
 ```
 
 [glob syntax]: https://github.com/dart-lang/glob#syntax
 
+### `names`
+
+This field restricts the tests run by the runner to those whose names match the
+given regular expressions. A test's name must match *all* regular expressions in
+`names`, as well as containing all strings in [`plain_names`](#plain_names), in
+order to be run.
+
+This is usually used in a [preset](#configuration-presets) to make it possible
+to quickly select a given set of tests.
+
+```yaml
+presets:
+  # Pass "-P chrome" to run only Chrome tests.
+  chrome:
+    names:
+    - "^browser:"
+    - "[Cc]hrome"
+```
+
+### `plain_names`
+
+This field restricts the tests run by the runner to those whose names contain
+the given strings. A test's name must contain *all* strings in `plain_names`, as
+well as matching all regular expressions in [`names`](#names), in order to be
+run.
+
+This is usually used in a [preset](#configuration-presets) to make it possible
+to quickly select a given set of tests.
+
+```yaml
+presets:
+  # Pass "-P ie" to run only Internet Explorer tests.
+  ie:
+    plain_names:
+    - "IE"
+    - "Internet Explorer"
+```
+
 ### `platforms`
 
 This field indicates which platforms tests should run on by default. It allows
 the same platform identifiers that can be passed to `--platform`. If multiple
 platforms are included, the test runner will default to running tests on all of
 them. This defaults to `[vm]`.
 
 ```yaml
 platforms: [content_shell]
 
@@ skipping 234 matching lines @@
 presets:
   # Shortcut for running only browser tests.
   browser:
     paths: [test/runner/browser]
 
   # Shortcut for running only Chrome tests.
   chrome:
     filename: "chrome_*_test.dart"
     add_presets: [browser]
 ```