[Regression fix] [Data URI parser] Accept data URI with invalid mediatype data

net/url_request/url_request_data_job_unittest.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 <string>
 
 #include "base/memory/ref_counted.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_version.h"
@@ skipping 45 matching lines @@
           GURL("bogus"), &mime_type, &charset, &data, headers.get()));
 }
 
 TEST(BuildResponseTest, InvalidMimeType) {
   std::string mime_type;
   std::string charset;
   std::string data;
   scoped_refptr<net::HttpResponseHeaders> headers(
       new net::HttpResponseHeaders(std::string()));
 
-  // MIME type contains delimiters. Must be rejected.
+  // MIME type contains delimiters. Must be accepted but Content-Type header
+  // should be generated as if the mediatype was text/plain.
   EXPECT_EQ(
-      net::ERR_INVALID_URL,
+      net::OK,
       URLRequestDataJob::BuildResponse(
           GURL("data:f(o/b)r,test"),
           &mime_type, &charset, &data, headers.get()));
+
+  std::string value;
+  EXPECT_TRUE(headers->GetNormalizedHeader("Content-Type", &value));
+  EXPECT_EQ(value, "text/plain;charset=US-ASCII");
 }
 
 TEST(BuildResponseTest, InvalidCharset) {
   std::string mime_type;
   std::string charset;
   std::string data;
   scoped_refptr<net::HttpResponseHeaders> headers(
       new net::HttpResponseHeaders(std::string()));
 
   // MIME type contains delimiters. Must be rejected.
   EXPECT_EQ(
       net::ERR_INVALID_URL,
       URLRequestDataJob::BuildResponse(
           GURL("data:text/html;charset=(),test"),
           &mime_type, &charset, &data, headers.get()));
 }
 
 }  // namespace net