Don’t use using directives (“using namespace”) in tests

util/misc/clock_test.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/misc/clock.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "gtest/gtest.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 TEST(Clock, ClockMonotonicNanoseconds) {
   uint64_t start = ClockMonotonicNanoseconds();
   EXPECT_GT(start, 0u);
 
   uint64_t now = start;
   for (size_t iteration = 0; iteration < 10; ++iteration) {
     uint64_t last = now;
     now = ClockMonotonicNanoseconds();
 
     // Use EXPECT_GE instead of EXPECT_GT, because there are no guarantees about
@@ skipping 45 matching lines @@
   for (size_t index = 0; index < arraysize(kTestData); ++index) {
     const uint64_t nanoseconds = kTestData[index];
     SCOPED_TRACE(
         base::StringPrintf("index %zu, nanoseconds %llu", index, nanoseconds));
 
     TestSleepNanoseconds(nanoseconds);
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad