Mojo: Trivial cleanup -- remove unneeded test fixture in test.

mojo/public/tests/system_core_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/public/system/core.h"
 
 #include <string.h>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace {
 
-class SystemTest : public testing::Test {
-};
-
-TEST_F(SystemTest, Basic) {
+TEST(SystemTest, Basic) {
   Handle h_0;
   MojoWaitFlags wf;
   char buffer[10] = { 0 };
   uint32_t buffer_size;
 
   // The only handle that's guaranteed to be invalid is |kInvalidHandle|.
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, Close(kInvalidHandle));
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             Wait(kInvalidHandle, MOJO_WAIT_FLAG_EVERYTHING, 1000000));
   h_0 = kInvalidHandle;
@@ skipping 67 matching lines @@
   EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION,
             Wait(h_1, MOJO_WAIT_FLAG_READABLE | MOJO_WAIT_FLAG_WRITABLE, 1000));
 
   EXPECT_EQ(MOJO_RESULT_OK, Close(h_1));
 }
 
 // TODO(vtl): Add multi-threaded tests.
 
 }  // namespace
 }  // namespace mojo