Applescript: return value from execute javascript command

content/browser/renderer_host/render_view_host.h

Index: content/browser/renderer_host/render_view_host.h
diff --git a/content/browser/renderer_host/render_view_host.h b/content/browser/renderer_host/render_view_host.h
index 516be59c84cf63622508dc97aa086ab2653eb94b..a295822b04dc0890e6d2f166d2e5fd19716d3dcc 100644
--- a/content/browser/renderer_host/render_view_host.h
+++ b/content/browser/renderer_host/render_view_host.h
@@ -14,8 +14,10 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/process_util.h"
+#include "base/values.h"
 #include "content/browser/renderer_host/render_widget_host.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/notification_observer.h"
 #include "content/public/common/window_container_type.h"
 #include "net/base/load_states.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
@@ -73,6 +75,27 @@ namespace net {
 class URLRequestContextGetter;
 }
 
+// NotificationObserver used to listen for EXECUTE_JAVASCRIPT_RESULT
+// notifications.
+class ExecuteNotificationObserver : public content::NotificationObserver {
+ public:
+  explicit ExecuteNotificationObserver(int id);
+  virtual ~ExecuteNotificationObserver();
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details);
+
+  int id() const { return id_; }
+
+  Value* value() const { return value_.get(); }
+
+ private:
+  int id_;
+  scoped_ptr<Value> value_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExecuteNotificationObserver);
+};
+
 //
 // RenderViewHost
 //
@@ -259,6 +282,10 @@ class CONTENT_EXPORT RenderViewHost : public RenderWidgetHost {
   int ExecuteJavascriptInWebFrameNotifyResult(const string16& frame_xpath,
                                               const string16& jscript);
 
+  Value* ExecuteJavascriptAndGetValue(const string16& frame_xpath,
+                                      const string16& jscript);
+
+
   // Notifies the RenderView that the JavaScript message that was shown was
   // closed by the user.
   void JavaScriptDialogClosed(IPC::Message* reply_msg,