Collect all ConnectionAttempts from both sockets in TransportConnectJob.

chrome/browser/devtools/device/usb/android_usb_socket.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/devtools/device/usb/android_usb_socket.h"
 
 #include "base/callback_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "net/base/net_errors.h"
 
@@ skipping 216 matching lines @@
 
 net::NextProto AndroidUsbSocket::GetNegotiatedProtocol() const {
   NOTIMPLEMENTED();
   return net::kProtoUnknown;
 }
 
 bool AndroidUsbSocket::GetSSLInfo(net::SSLInfo* ssl_info) {
   return false;
 }
 
+void AndroidUsbSocket::GetConnectionAttempts(ConnectionAttempts* out) const {
+  out->clear();
+}
+
 void AndroidUsbSocket::RespondToReader(bool disconnect) {
   if (read_callback_.is_null() || (read_buffer_.empty() && !disconnect))
     return;
   size_t bytes_to_copy =
       static_cast<size_t>(read_length_) > read_buffer_.length() ?
           read_buffer_.length() : static_cast<size_t>(read_length_);
   memcpy(read_io_buffer_->data(), read_buffer_.data(), bytes_to_copy);
   if (read_buffer_.length() > bytes_to_copy)
     read_buffer_ = read_buffer_.substr(bytes_to_copy);
   else
     read_buffer_ = std::string();
   base::ResetAndReturn(&read_callback_).Run(bytes_to_copy);
 }
 
 void AndroidUsbSocket::RespondToWriter(int result) {
   if (!write_callback_.is_null())
     base::ResetAndReturn(&write_callback_).Run(result);
 }