Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components-chromium/paper-styles/typography.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 <!-- TODO(nevir): Should we upgrade Polymer/font-roboto to the final font? -->
 <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Roboto:400,300,300italic,400italic,500,500italic,700,700italic">
 
 <link rel="import" href="../polymer/polymer.html">
 
-<style is="x-style">
+<style is="custom-style">
 
-  * {
+  :root {
 
     /* Shared Styles */
 
     /*
     Unfortunately, we can't make use of these yet - sibling properties aren't
     evaluated. See https://github.com/Polymer/polymer/issues/1399
 
     --paper-font-common-base: {
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-    }
+    };
 
     --paper-font-common-code: {
       font-family: 'Inconsolata', 'Consolas', 'Source Code Pro', 'Monaco', 'Menlo', monospace;
       -webkit-font-smoothing: antialiased;
-    }
+    };
 
     --paper-font-common-expensive-kerning: {
       text-rendering: optimizeLegibility;
-    }
+    };
 
     --paper-font-common-nowrap: {
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
-    }
+    };
     */
 
     /* Material Font Styles */
 
     --paper-font-display4: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
-      /* mixin(--paper-font-common-nowrap); */
+      /* @apply(--paper-font-common-nowrap); */
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
 
       font-size: 112px;
       font-weight: 300;
       letter-spacing: -.044em;
       line-height: 120px;
-    }
+    };
 
     --paper-font-display3: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
-      /* mixin(--paper-font-common-nowrap); */
+      /* @apply(--paper-font-common-nowrap); */
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
 
       font-size: 56px;
       font-weight: 400;
       letter-spacing: -.026em;
       line-height: 60px;
-    }
+    };
 
     --paper-font-display2: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
 
       font-size: 45px;
       font-weight: 400;
       letter-spacing: -.018em;
       line-height: 48px;
-    }
+    };
 
     --paper-font-display1: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
 
       font-size: 34px;
       font-weight: 400;
       letter-spacing: -.01em;
       line-height: 40px;
-    }
+    };
 
     --paper-font-headline: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
 
       font-size: 24px;
       font-weight: 400;
       letter-spacing: -.012em;
       line-height: 32px;
-    }
+    };
 
     --paper-font-title: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
-      /* mixin(--paper-font-common-nowrap); */
+      /* @apply(--paper-font-common-nowrap); */
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
 
       font-size: 20px;
       font-weight: 500;
       line-height: 28px;
-    }
+    };
 
     --paper-font-subhead: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
 
       font-size: 16px;
       font-weight: 400;
       line-height: 24px;
-    }
+    };
 
     --paper-font-body2: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
 
       font-size: 14px;
       font-weight: 500;
       line-height: 24px;
-    }
+    };
 
     --paper-font-body1: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
 
       font-size: 14px;
       font-weight: 400;
       line-height: 20px;
-    }
+    };
 
     --paper-font-caption: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-nowrap); */
+      /* @apply(--paper-font-common-nowrap); */
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
 
       font-size: 12px;
       font-weight: 400;
       letter-spacing: 0.011em;
       line-height: 20px;
-    }
+    };
 
     --paper-font-menu: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
-      /* mixin(--paper-font-common-nowrap); */
+      /* @apply(--paper-font-common-nowrap); */
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
 
       font-size: 13px;
       font-weight: 500;
       line-height: 24px;
-    }
+    };
 
     --paper-font-button: {
-      /* mixin(--paper-font-common-base) */
+      /* @apply(--paper-font-common-base) */
       font-family: 'Roboto', 'Noto', sans-serif;
       -webkit-font-smoothing: antialiased;
-      /* mixin(--paper-font-common-expensive-kerning); */
+      /* @apply(--paper-font-common-expensive-kerning); */
       text-rendering: optimizeLegibility;
-      /* mixin(--paper-font-common-nowrap); */
+      /* @apply(--paper-font-common-nowrap); */
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
 
       font-size: 14px;
       font-weight: 500;
       letter-spacing: 0.018em;
       line-height: 24px;
       text-transform: uppercase;
-    }
+    };
 
     --paper-font-code2: {
-      /* mixin(--paper-font-common-code); */
+      /* @apply(--paper-font-common-code); */
       font-family: 'Inconsolata', 'Consolas', 'Source Code Pro', 'Monaco', 'Menlo', monospace;
       -webkit-font-smoothing: antialiased;
 
       font-size: 14px;
       font-weight: 700;
       line-height: 20px;
-    }
+    };
 
     --paper-font-code1: {
-      /* mixin(--paper-font-common-code); */
+      /* @apply(--paper-font-common-code); */
       font-family: 'Inconsolata', 'Consolas', 'Source Code Pro', 'Monaco', 'Menlo', monospace;
       -webkit-font-smoothing: antialiased;
 
       font-size: 14px;
       font-weight: 500;
       line-height: 20px;
-    }
+    };
 
   }
 
 </style>