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

net/dns/single_request_host_resolver_unittest.cc

Index: net/dns/single_request_host_resolver_unittest.cc
diff --git a/net/dns/single_request_host_resolver_unittest.cc b/net/dns/single_request_host_resolver_unittest.cc
index c5bb9f1ae6b0983988f472f30cef4ea531b7cc02..c0b3a7b82cda8a8c031580ad4adb3b85d4bbfb58 100644
--- a/net/dns/single_request_host_resolver_unittest.cc
+++ b/net/dns/single_request_host_resolver_unittest.cc
@@ -10,8 +10,13 @@
 #include "net/base/test_completion_callback.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/log/net_log.h"
+#include "net/test/gtest_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using net::test::IsError;
+using net::test::IsOk;
+
 namespace net {
 
 namespace {
@@ -78,8 +83,8 @@ TEST(SingleRequestHostResolverTest, NormalResolve) {
   HostResolver::RequestInfo request(HostPortPair("watsup", 90));
   int rv = single_request_resolver.Resolve(
       request, DEFAULT_PRIORITY, &addrlist, callback.callback(), BoundNetLog());
-  EXPECT_EQ(ERR_IO_PENDING, rv);
-  EXPECT_EQ(OK, callback.WaitForResult());
+  EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
+  EXPECT_THAT(callback.WaitForResult(), IsOk());
 
   // Verify that the result is what we specified in the MockHostResolver.
   ASSERT_FALSE(addrlist.empty());
@@ -102,7 +107,7 @@ TEST(SingleRequestHostResolverTest, Cancel) {
                                              &addrlist,
                                              callback.callback(),
                                              BoundNetLog());
-    EXPECT_EQ(ERR_IO_PENDING, rv);
+    EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
     EXPECT_TRUE(resolver.has_outstanding_request());
   }