Stop linking in the old Mojo EDK.

ipc/attachment_broker.h

Index: ipc/attachment_broker.h
diff --git a/ipc/attachment_broker.h b/ipc/attachment_broker.h
index 4cf1ab5de587c6407aeb26f7ab478f4000a08eee..0c50da507813344e0f9be8d5e4a3fb263edb73f7 100644
--- a/ipc/attachment_broker.h
+++ b/ipc/attachment_broker.h
@@ -26,7 +26,7 @@
 #endif  // defined(OS_WIN)
 
 namespace base {
-class SequencedTaskRunner;
+class TaskRunner;
 };
 
 namespace IPC {
@@ -85,7 +85,7 @@ class IPC_EXPORT AttachmentBroker : public Listener {
   // Notifications to |observer| will be posted to |runner|.
   // The |observer| is expected to call RemoveObserver() before being destroyed.
   void AddObserver(Observer* observer,
-                   const scoped_refptr<base::SequencedTaskRunner>& runner);
+                   const scoped_refptr<base::TaskRunner>& runner);
   void RemoveObserver(Observer* observer);
 
   // These two methods should only be called by the broker process.
@@ -140,7 +140,7 @@ class IPC_EXPORT AttachmentBroker : public Listener {
     int unique_id;
 
     // Notifications must be dispatched onto |runner|.
-    scoped_refptr<base::SequencedTaskRunner> runner;
+    scoped_refptr<base::TaskRunner> runner;
   };
   std::vector<ObserverInfo> observers_;