Reland #2 "ipc: Add a new field num_brokered_attachments to the message header."

ipc/ipc_channel_win.cc

Index: ipc/ipc_channel_win.cc
diff --git a/ipc/ipc_channel_win.cc b/ipc/ipc_channel_win.cc
index 79b000180546540289e80b2a5b9cad8195b9bd05..56dc4b7cba13ac59b41295d5e3607f83dea0d893 100644
--- a/ipc/ipc_channel_win.cc
+++ b/ipc/ipc_channel_win.cc
@@ -474,6 +474,17 @@ bool ChannelWin::ProcessOutgoingMessages(
 
   // Write to pipe...
   OutputElement* element = output_queue_.front();
+
+  // TODO(erikchen): Temporary code to help track http://crbug.com/527588.
+  {
+    const Message* m = element->get_message();
+    if (m) {
+      Channel::MessageVerifier verifier = Channel::GetMessageVerifier();
+      if (verifier)
+        verifier(m);
+    }
+  }
+
   DCHECK(element->size() <= INT_MAX);
   BOOL ok = WriteFile(pipe_.Get(),
                       element->data(),