Modify pdf_scripting_api.js to support postMessage using BrowserPlugin

chrome/browser/resources/pdf/main.js

Index: chrome/browser/resources/pdf/main.js
diff --git a/chrome/browser/resources/pdf/main.js b/chrome/browser/resources/pdf/main.js
index cb7f0732ba92f2ae69adb128f1e8b635e064a479..c39c8abf96a155216edad9ec55d522a340482fd3 100644
--- a/chrome/browser/resources/pdf/main.js
+++ b/chrome/browser/resources/pdf/main.js
@@ -16,6 +16,8 @@ var viewer;
  * PDFViewer object with it.
  */
 (function main() {
+  viewer = new PDFViewer();
+
   // If the viewer is started from the browser plugin, the view ID will be
   // passed in which identifies the instance of the plugin.
   var params = window.location.search.substring(1).split('=');
@@ -27,7 +29,7 @@ var viewer;
     chrome.runtime.sendMessage(
         'mhjfbmdgcfjbbpaeojofohoefgiehjai',
         {viewId: viewId},
-        function(streamDetails) { viewer = new PDFViewer(streamDetails); });
+        function(streamDetails) { viewer.init(streamDetails); });
     return;
   }
 
@@ -45,12 +47,12 @@ var viewer;
     tabId: -1
   };
   if (!chrome.tabs) {
-    viewer = new PDFViewer(streamDetails);
+    viewer.init(streamDetails);
     return;
   }
   chrome.tabs.getCurrent(function(tab) {
     if (tab && tab.id != undefined)
       streamDetails.tabId = tab.id;
-    viewer = new PDFViewer(streamDetails);
+    viewer.init(streamDetails);
   });
 })();