Material PDF: Add required Polymer 0.8 elements.

third_party/polymer/v0_8/components/layout/.bower.json

Index: third_party/polymer/v0_8/components/layout/.bower.json
diff --git a/third_party/polymer/v0_8/components/layout/.bower.json b/third_party/polymer/v0_8/components/layout/.bower.json
new file mode 100644
index 0000000000000000000000000000000000000000..550b7c11f7c4c96ba5d34adb4414439e49a17957
--- /dev/null
+++ b/third_party/polymer/v0_8/components/layout/.bower.json
@@ -0,0 +1,25 @@
+{
+  "name": "layout",
+  "homepage": "https://github.com/Polymer/layout",
+  "description": "A declarative layout system built on top of CSS flexbox.",
+  "main": "layout.html",
+  "keywords": [
+    "layout",
+    "flexbox"
+  ],
+  "authors": [
+    "The Polymer Project Authors"
+  ],
+  "license": "https://polymer.github.io/LICENSE.txt",
+  "private": true,
+  "ignore": [],
+  "_release": "d02a404b77",
+  "_resolution": {
+    "type": "branch",
+    "branch": "0.8-preview",
+    "commit": "d02a404b772d306b15bccd837b33092c4d4691c0"
+  },
+  "_source": "git://github.com/Polymer/layout.git",
+  "_target": "0.8-preview",
+  "_originalSource": "Polymer/layout"
+}