Add a slide-in pane to the OOP PDF viewer.

chrome/browser/resources/pdf/elements/pdf-pane/pdf-pane.js

Index: chrome/browser/resources/pdf/elements/pdf-pane/pdf-pane.js
diff --git a/chrome/browser/resources/pdf/elements/pdf-pane/pdf-pane.js b/chrome/browser/resources/pdf/elements/pdf-pane/pdf-pane.js
new file mode 100644
index 0000000000000000000000000000000000000000..a7be882cac756e240396a7b7cbc753ea4ae8e1a3
--- /dev/null
+++ b/chrome/browser/resources/pdf/elements/pdf-pane/pdf-pane.js
@@ -0,0 +1,15 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+Polymer('pdf-pane', {
+    heading: '',
+
+    ready: function() {
+      // Prevent paper-dialog-base from scrolling back to top.
+      this.$.dialog.openAction = function() {};
+    },
+    toggle: function() {
+      this.$.dialog.toggle();
+    }
+});