Ensure that any IPC sent from a child process that couldn't be deserialized causes that p…

ipc/ipc_message.h

Index: ipc/ipc_message.h
===================================================================
--- ipc/ipc_message.h	(revision 270662)
+++ ipc/ipc_message.h	(working copy)
@@ -121,6 +121,14 @@
     return (header()->flags & PUMPING_MSGS_BIT) != 0;
   }
 
+  void set_dispatch_error() const {
+    dispatch_error_ = true;
+  }
+
+  bool dispatch_error() const {
+    return dispatch_error_;
+  }
+
   uint32 type() const {
     return header()->type;
   }
@@ -236,8 +244,11 @@
     return headerT<Header>();
   }
 
-  void InitLoggingVariables();
+  void Init();
 
+  // Used internally to support IPC::Listener::OnBadMessageReceived.
+  mutable bool dispatch_error_;
+
 #if defined(OS_POSIX)
   // The set of file descriptors associated with this message.
   scoped_refptr<FileDescriptorSet> file_descriptor_set_;