Revert 70141 - Make a few more places use bool for OnMessageReceived....

chrome/common/ipc_test_sink.h

Index: chrome/common/ipc_test_sink.h
===================================================================
--- chrome/common/ipc_test_sink.h	(revision 70144)
+++ chrome/common/ipc_test_sink.h	(working copy)
@@ -54,7 +54,7 @@
 
   // Used by the source of the messages to send the message to the sink. This
   // will make a copy of the message and store it in the list.
-  bool OnMessageReceived(const Message& msg);
+  void OnMessageReceived(const Message& msg);
 
   // Returns the number of messages in the queue.
   size_t message_count() const { return messages_.size(); }