Move url_request_test_util into net namespace

net/socket_stream/socket_stream_unittest.cc

Index: net/socket_stream/socket_stream_unittest.cc
diff --git a/net/socket_stream/socket_stream_unittest.cc b/net/socket_stream/socket_stream_unittest.cc
index 594b3a688153f42836c91f9232a8d6a35b364a0d..3e43dff3958e98ac771f43021f514ef2437f4e10 100644
--- a/net/socket_stream/socket_stream_unittest.cc
+++ b/net/socket_stream/socket_stream_unittest.cc
@@ -179,7 +179,7 @@ class SocketStreamEventRecorder : public net::SocketStream::Delegate {
   DISALLOW_COPY_AND_ASSIGN(SocketStreamEventRecorder);
 };
 
-class TestURLRequestContextWithProxy : public TestURLRequestContext {
+class TestURLRequestContextWithProxy : public net::TestURLRequestContext {
  public:
   explicit TestURLRequestContextWithProxy(const std::string& proxy)
       : TestURLRequestContext(true) {
@@ -189,7 +189,7 @@ class TestURLRequestContextWithProxy : public TestURLRequestContext {
   virtual ~TestURLRequestContextWithProxy() {}
 };
 
-class TestSocketStreamNetworkDelegate : public TestNetworkDelegate {
+class TestSocketStreamNetworkDelegate : public net::TestNetworkDelegate {
  public:
   TestSocketStreamNetworkDelegate()
       : before_connect_result_(net::OK) {}