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

util/mach/task_memory_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/mach/task_memory.h"
 
 #include <mach/mach.h>
 #include <string.h>
 
 #include <algorithm>
 #include <string>
 
 #include "base/mac/scoped_mach_port.h"
 #include "base/mac/scoped_mach_vm.h"
 #include "base/memory/scoped_ptr.h"
 #include "gtest/gtest.h"
 #include "util/test/mac/mach_errors.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-using namespace crashpad::test;
-
 TEST(TaskMemory, ReadSelf) {
   vm_address_t address = 0;
   const vm_size_t kSize = 4 * PAGE_SIZE;
   kern_return_t kr =
       vm_allocate(mach_task_self(), &address, kSize, VM_FLAGS_ANYWHERE);
   ASSERT_EQ(KERN_SUCCESS, kr) << MachErrorMessage(kr, "vm_allocate");
   base::mac::ScopedMachVM vm_owner(address, mach_vm_round_page(kSize));
 
   char* region = reinterpret_cast<char*>(address);
   for (size_t index = 0; index < kSize; ++index) {
@@ skipping 501 matching lines @@
   EXPECT_EQ("9", string);
   EXPECT_TRUE(mapped->ReadCString(10, &string));
   EXPECT_EQ("", string);
 
   // These are still out of range.
   EXPECT_FALSE(mapped->ReadCString(11, &string));
   EXPECT_FALSE(mapped->ReadCString(12, &string));
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad