Make NetLog take in callbacks that return Values

net/http/http_request_headers_unittest.cc

Index: net/http/http_request_headers_unittest.cc
===================================================================
--- net/http/http_request_headers_unittest.cc	(revision 141317)
+++ net/http/http_request_headers_unittest.cc	(working copy)
@@ -4,6 +4,7 @@
 
 #include "net/http/http_request_headers.h"
 
+#include "base/values.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
@@ -163,6 +164,24 @@
   EXPECT_EQ("B: b\r\nC: c\r\n\r\n", headers.ToString());
 }
 
+TEST(HttpRequestHeaders, ToNetLogParamAndBackAgain) {
+  HttpRequestHeaders headers;
+  headers.SetHeader("B", "b");
+  headers.SetHeader("A", "a");
+  std::string request_line("GET /stuff");
+
+  scoped_ptr<base::Value> event_param(
+      headers.NetLogCallback(&request_line, NetLog::LOG_ALL_BUT_BYTES));
+  HttpRequestHeaders headers2;
+  std::string request_line2;
+
+  ASSERT_TRUE(HttpRequestHeaders::FromNetLogParam(event_param.get(),
+                                                  &headers2,
+                                                  &request_line2));
+  EXPECT_EQ(request_line, request_line2);
+  EXPECT_EQ("B: b\r\nA: a\r\n\r\n", headers2.ToString());
+}
+
 }  // namespace
 
 }  // namespace net