Use EnumerateHeaderLines to parse added headers in webRequest API

chrome/browser/extensions/api/web_request/web_request_api_unittest.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 <map>
 #include <queue>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 1269 matching lines @@
   EXPECT_EQ("value3", value);
 }
 
 TEST(ExtensionWebRequestHelpersTest, TestCalculateOnHeadersReceivedDelta) {
   const bool cancel = true;
   char base_headers_string[] =
       "HTTP/1.0 200 OK\r\n"
       "Key1: Value1\r\n"
       "Key2: Value2, Bar\r\n"
       "Key3: Value3\r\n"
+      "Key5: Value5, end5\r\n"
       "\r\n";
   scoped_refptr<net::HttpResponseHeaders> base_headers(
       new net::HttpResponseHeaders(
         net::HttpUtil::AssembleRawHeaders(
             base_headers_string, sizeof(base_headers_string))));
 
   ResponseHeaders new_headers;
   new_headers.push_back(ResponseHeader("kEy1", "Value1"));  // Unchanged
   new_headers.push_back(ResponseHeader("Key2", "Value1"));  // Modified
   // Key3 is deleted
   new_headers.push_back(ResponseHeader("Key4", "Value4"));  // Added
+  new_headers.push_back(ResponseHeader("Key5", "Value5, end5"));  // Unchanged
   GURL effective_new_url;
 
   scoped_ptr<EventResponseDelta> delta(
       CalculateOnHeadersReceivedDelta("extid",
                                       base::Time::Now(),
                                       cancel,
                                       effective_new_url,
                                       base_headers.get(),
                                       &new_headers));
   ASSERT_TRUE(delta.get());
@@ skipping 936 matching lines @@
   EXPECT_TRUE(credentials_set);
   EXPECT_FALSE(auth3.Empty());
   EXPECT_EQ(username, auth1.username());
   EXPECT_EQ(password, auth1.password());
   EXPECT_EQ(1u, warning_set.size());
   EXPECT_TRUE(HasWarning(warning_set, "extid2"));
   EXPECT_EQ(3u, capturing_net_log.GetSize());
 }
 
 }  // namespace extensions