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

client/capture_context_mac_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 "client/capture_context_mac.h"
 
 #include <mach/mach.h>
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "build/build_config.h"
 #include "gtest/gtest.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-
 // If the context structure has fields that tell whether it’s valid, such as
 // magic numbers or size fields, sanity-checks those fields for validity with
 // fatal gtest assertions. For other fields, where it’s possible to reason about
 // their validity based solely on their contents, sanity-checks via nonfatal
 // gtest assertions.
 void SanityCheckContext(NativeCPUContext* context) {
 #if defined(ARCH_CPU_X86)
   ASSERT_EQ(x86_THREAD_STATE32, context->tsh.flavor);
   ASSERT_EQ(static_cast<int>(x86_THREAD_STATE32_COUNT), context->tsh.count);
 #elif defined(ARCH_CPU_X86_64)
@@ skipping 106 matching lines @@
 }
 
 TEST(CaptureContextMac, CaptureContext) {
   TestCaptureContext();
   if (Test::HasFatalFailure()) {
     return;
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad