feat: add feature targeting for styles to tab-related packages

Adds support for style feature targeting to the `tab`, `tab-bar`, `tab-indicator` and `tab-scroller` packages.

packages/mdc-tab-bar/_mixins.scss

@@ -1,26 +1,40 @@
-/**
- * @license
- * Copyright 2018 Google Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
+//
+// Copyright 2018 Google Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
 
-@mixin mdc-tab-bar-width($width) {
-  width: $width;
+@import "@material/feature-targeting/functions";
+@import "@material/feature-targeting/mixins";
+
+@mixin mdc-tab-bar-core-styles($query: mdc-feature-all()) {
+  // postcss-bem-linter: define tab-bar
+  .mdc-tab-bar {
+    @include mdc-tab-bar-width(100%, $query);
+  }
+  // postcss-bem-linter: end
+}
+
+@mixin mdc-tab-bar-width($width, $query: mdc-feature-all()) {
+  $feat-structure: mdc-feature-create-target($query, structure);
+
+  @include mdc-feature-targets($feat-structure) {
+    width: $width;
+  }
 }

packages/mdc-tab-bar/mdc-tab-bar.scss

@@ -22,11 +22,4 @@
  */
 
 @import "./mixins";
-
-// postcss-bem-linter: define tab-bar
-
-.mdc-tab-bar {
-  @include mdc-tab-bar-width(100%);
-}
-
-// postcss-bem-linter: end
+@include mdc-tab-bar-core-styles;