Hookup print and save buttons in the out of process PDF plugin

chrome/browser/resources/pdf/background.js

 // Copyright 2013 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.
 
+/**
+ * @private

[arv (Not doing code reviews), 2014/02/20 20:10:45]

Use an IIFE

(function() {
  'use strict';

  var streamsCache = [];

  ...
})();

[raymes, 2014/02/21 03:52:24]

Done.

+ * Keep a stack of stream details for requests. These are pushed onto the stack
+ * as requests come in and popped off the stack as they are handled by a
+ * renderer.
+ * TODO(raymes): This is probably racy for multiple requests. We could associate
+ * an ID with the request but this code will probably change completely when
+ * MIME type handling is improved.
+ */
+var streamsCache_ = [];

[arv (Not doing code reviews), 2014/02/20 20:10:45]

No underscores on variables.

[raymes, 2014/02/21 03:52:24]

Done.

+
+function popStreamDetails() {
+  if (streamsCache_.length > 0)
+    return streamsCache_.pop();
+}
+
 chrome.streamsPrivate.onExecuteMimeTypeHandler.addListener(
   function(mime_type, original_url, content_url, tab_id) {
     // TODO(raymes): Currently this doesn't work with embedded PDFs (it
     // causes the entire frame to navigate). Also work out how we can
     // mask the URL with the URL of the PDF.
-    chrome.tabs.update(tab_id, { url: 'index.html?' + content_url });
+    var streamDetails = {
+      mimeType: mime_type,
+      originalURL: original_url,
+      streamURL: content_url
+    };
+    streamsCache_.push(streamDetails);
+    chrome.tabs.update(tab_id, { url: 'index.html' });
   }
 );