Move remaining content test code into the content namespace.

content/test/net/url_request_failed_job.cc

Index: content/test/net/url_request_failed_job.cc
===================================================================
--- content/test/net/url_request_failed_job.cc	(revision 164732)
+++ content/test/net/url_request_failed_job.cc	(working copy)
@@ -12,6 +12,7 @@
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_filter.h"
 
+namespace content {
 namespace {
 
 const char kMockHostname[] = "mock.failed.request";
@@ -89,3 +90,5 @@
   NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::FAILED,
                                          net_error_));
 }
+
+}  // namespace content