Roll third_party/polymer.

third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html

Index: third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html
diff --git a/third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html b/third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html
index 7315faf1c3036ce593292e83c33b817a7c91f94e..d98e9d0fddf06b7ca3d1f69b8f50321bd078a559 100644
--- a/third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html
+++ b/third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html
@@ -20,14 +20,14 @@ The layout class stylesheet provides a simple set of class-based flexbox rules,
 let you specify layout properties directly in markup. You must include this file
 in every element that needs to use them.
 
-Sample use:
+  Sample use:
 
-    <link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
-    <style is="custom-style" include="iron-flex iron-flex-alignment">
+      <link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
+      <style is="custom-style" include="iron-flex iron-flex-alignment"></style>
 
-    <div class="layout horizontal layout-start">
-      <div>cross axis start alignment</div>
-    </div>
+      <div class="layout horizontal layout-start">
+        <div>cross axis start alignment</div>
+      </div>
 
 2. [Custom CSS mixins](https://github.com/PolymerElements/iron-flex-layout/blob/master/iron-flex-layout.html).
 The mixin stylesheet includes custom CSS mixins that can be applied inside a CSS rule using the `@apply` function.
@@ -218,6 +218,12 @@ A complete [guide](https://elements.polymer-project.org/guides/flex-layout) to `
       align-items: flex-end;
     };
 
+    --layout-baseline: {
+      -ms-flex-align: baseline;
+      -webkit-align-items: baseline;
+      align-items: baseline;
+    };
+
     /* alignment in main axis */
 
     --layout-start-justified: {
@@ -281,6 +287,49 @@ A complete [guide](https://elements.polymer-project.org/guides/flex-layout) to `
       align-self: stretch;
     };
 
+    --layout-self-baseline: {
+      -ms-align-self: baseline;
+      -webkit-align-self: baseline;
+      align-self: baseline;
+    };
+
+    /* multi-line alignment in main axis */
+
+    --layout-start-aligned: {
+      -ms-flex-line-pack: start;  /* IE10 */
+      -ms-align-content: flex-start;
+      -webkit-align-content: flex-start;
+      align-content: flex-start;
+    };
+
+    --layout-end-aligned: {
+      -ms-flex-line-pack: end;  /* IE10 */
+      -ms-align-content: flex-end;
+      -webkit-align-content: flex-end;
+      align-content: flex-end;
+    };
+
+    --layout-center-aligned: {
+      -ms-flex-line-pack: center;  /* IE10 */
+      -ms-align-content: center;
+      -webkit-align-content: center;
+      align-content: center;
+    };
+
+    --layout-between-aligned: {
+      -ms-flex-line-pack: justify;  /* IE10 */
+      -ms-align-content: space-between;
+      -webkit-align-content: space-between;
+      align-content: space-between;
+    };
+
+    --layout-around-aligned: {
+      -ms-flex-line-pack: distribute;  /* IE10 */
+      -ms-align-content: space-around;
+      -webkit-align-content: space-around;
+      align-content: space-around;
+    };
+
     /*******************************
               Other Layout
     *******************************/