[WIP] Hack on Blob mojom

content/child/thread_safe_sender.h

Index: content/child/thread_safe_sender.h
diff --git a/content/child/thread_safe_sender.h b/content/child/thread_safe_sender.h
index bf5253e041853cd32f6b51a796c5f2ed2c8c9c35..5441edcf4f292c75014826e8e886ac7947d67f96 100644
--- a/content/child/thread_safe_sender.h
+++ b/content/child/thread_safe_sender.h
@@ -9,15 +9,12 @@
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_sender.h"
+#include "ipc/ipc_sync_message_filter.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
-namespace IPC {
-class SyncMessageFilter;
-}
-
 namespace content {
 class ChildThreadImpl;
 
@@ -28,6 +25,10 @@ class CONTENT_EXPORT ThreadSafeSender
  public:
   bool Send(IPC::Message* msg) override;
 
+  scoped_refptr<IPC::SyncMessageFilter> sync_filter() const {
+    return sync_filter_;
+  }
+
  protected:
   ThreadSafeSender(
       const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner,