Added new fileBrowserPrivate and fileHandler extension APIs

chrome/renderer/resources/event_bindings.js

Index: chrome/renderer/resources/event_bindings.js
===================================================================
--- chrome/renderer/resources/event_bindings.js	(revision 81868)
+++ chrome/renderer/resources/event_bindings.js	(working copy)
@@ -7,6 +7,7 @@
   native function GetChromeHidden();
   native function AttachEvent(eventName);
   native function DetachEvent(eventName);
+  native function GetExternalFileEntry(fileDefinition);
 
   var chromeHidden = GetChromeHidden();
 
@@ -88,6 +89,18 @@
     if (attachedNamedEvents[name]) {
       if (args) {
         args = chromeHidden.JSON.parse(args);
+        // TODO(zelidrag|aa): Remove this hack from here once we enable event
+        // JSON payload unpacking on C++ side.
+        if (name == "fileBrowserHandler.onExecute") {
+          if (args.length != 2)
+            return;
+          var fileList = args[1];
+          // The second parameter for this event's payload is file definition
+          // dictionary that we used to reconstruct File API's Entry instance
+          // here.
+          for (var i = 0; i < fileList.length; i++)
+            args[1][i] = GetExternalFileEntry(fileList[i]);
+        }
       }
       return attachedNamedEvents[name].dispatch.apply(
           attachedNamedEvents[name], args);