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

content/common/resource_messages.cc

Index: content/common/resource_messages.cc
diff --git a/content/common/resource_messages.cc b/content/common/resource_messages.cc
index 9cadbfffd7f2cec29e134f80a85c27d49d851b96..c4169ba6454e6914ca29983f850b1bf75ccd8a70 100644
--- a/content/common/resource_messages.cc
+++ b/content/common/resource_messages.cc
@@ -4,9 +4,25 @@
 
 #include "content/common/resource_messages.h"
 
+#include "base/debug/alias.h"
+#include "ipc/ipc_message.h"
 #include "net/base/load_timing_info.h"
 #include "net/http/http_response_headers.h"
 
+namespace content {
+// TODO(erikchen): Temporary code to help track http://crbug.com/527588.
+void CheckContentsOfDataReceivedMessage(const IPC::Message* message) {
+  if (message->type() != ResourceMsg_DataReceived::ID)
+    return;
+  ResourceMsg_DataReceived::Schema::Param arg;
+  bool success = ResourceMsg_DataReceived::Read(message, &arg);
+  CHECK(success);
+  int data_offset = base::get<1>(arg);
+  CHECK_LE(data_offset, 512 * 1024);
+  base::debug::Alias(&data_offset);
+}
+}
+
 namespace IPC {
 
 void ParamTraits<scoped_refptr<net::HttpResponseHeaders> >::Write(