Revert of Reland #1 "ipc: Add a new field num_brokered_attachments to the message header."

content/browser/loader/async_resource_handler.cc

Index: content/browser/loader/async_resource_handler.cc
diff --git a/content/browser/loader/async_resource_handler.cc b/content/browser/loader/async_resource_handler.cc
index 96cb4f401ff18b0eb6ae5e2169e049cba342f5b6..2eace36852ea9a048c8a6dd6f77135619b42752a 100644
--- a/content/browser/loader/async_resource_handler.cc
+++ b/content/browser/loader/async_resource_handler.cc
@@ -329,11 +329,6 @@
   int encoded_data_length = current_transfer_size - reported_transfer_size_;
   reported_transfer_size_ = current_transfer_size;
 
-  // TODO(erikchen): Remove me after finished debugging for
-  // http://crbug.com/527588.
-  // The data offset can't exceed the size of the buffer.
-  CHECK_LE(data_offset, kBufferSize);
-
   filter->Send(new ResourceMsg_DataReceived(
       GetRequestID(), data_offset, bytes_read, encoded_data_length));
   ++pending_data_count_;