Moves HTTP POST handling to JS.

chrome/browser/resources/print_preview/data/print_ticket_store.js

Index: chrome/browser/resources/print_preview/data/print_ticket_store.js
diff --git a/chrome/browser/resources/print_preview/data/print_ticket_store.js b/chrome/browser/resources/print_preview/data/print_ticket_store.js
index e1ec56ba44d84554705008b55f2b26e7aac26710..efb689e1ec9cd714c17bd06ab02e597214ff78ae 100644
--- a/chrome/browser/resources/print_preview/data/print_ticket_store.js
+++ b/chrome/browser/resources/print_preview/data/print_ticket_store.js
@@ -254,6 +254,11 @@ cr.define('print_preview', function() {
       return this.documentInfo_.margins;
     },
 
+    /** @return {string} Title of the document. */
+    getDocumentTitle: function() {
+      return this.documentInfo_.title;
+    },
+
     /**
      * Initializes the print ticket store. Dispatches an INITIALIZE event.
      * @param {boolean} isDocumentModifiable Whether the document to print is