Refactor net tests to use GMock matchers for checking net::Error results

net/quic/p2p/quic_p2p_session_test.cc

Index: net/quic/p2p/quic_p2p_session_test.cc
diff --git a/net/quic/p2p/quic_p2p_session_test.cc b/net/quic/p2p/quic_p2p_session_test.cc
index 04f8ef46768f3a8ea475a3842436d91b3c018fec..eebc68b00798f01f81bebe21c3dd053499186392 100644
--- a/net/quic/p2p/quic_p2p_session_test.cc
+++ b/net/quic/p2p/quic_p2p_session_test.cc
@@ -26,8 +26,12 @@
 #include "net/quic/quic_chromium_packet_writer.h"
 #include "net/quic/test_tools/quic_session_peer.h"
 #include "net/socket/socket.h"
+#include "net/test/gtest_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using net::test::IsOk;
+
 namespace net {
 
 namespace {
@@ -263,7 +267,7 @@ class QuicP2PSessionTest : public ::testing::Test {
 };
 
 void QuicP2PSessionTest::OnWriteResult(int result) {
-  EXPECT_EQ(OK, result);
+  EXPECT_THAT(result, IsOk());
 }
 
 void QuicP2PSessionTest::TestStreamConnection(QuicP2PSession* from_session,