Adds a DCHECK that the host argument to QuicInMemoryCache::AddResponse is not empty. An empty host …

net/tools/quic/quic_in_memory_cache.cc

 // Copyright (c) 2012 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 "net/tools/quic/quic_in_memory_cache.h"
 
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 186 matching lines @@
   STLDeleteValues(&responses_);
 }
 
 void QuicInMemoryCache::AddResponseImpl(
     StringPiece host,
     StringPiece path,
     SpecialResponseType response_type,
     const SpdyHeaderBlock& response_headers,
     StringPiece response_body,
     const SpdyHeaderBlock& response_trailers) {
+  DCHECK(!host.empty()) << "Host must be populated, e.g. \"www.google.com\"";
   string key = GetKey(host, path);
   if (ContainsKey(responses_, key)) {
     LOG(DFATAL) << "Response for '" << key << "' already exists!";
     return;
   }
   Response* new_response = new Response();
   new_response->set_response_type(response_type);
   new_response->set_headers(response_headers);
   new_response->set_body(response_body);
   new_response->set_trailers(response_trailers);
@@ skipping 36 matching lines @@
     ServerPushInfo push_resource = it->second;
     if (push_resource.request_url.spec() == resource.request_url.spec()) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace tools
 }  // namespace net