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

minidump/minidump_memory_writer_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 "minidump/minidump_memory_writer.h"
 
 #include <dbghelp.h>
 #include <stdint.h>
 
 #include "base/basictypes.h"
 #include "gtest/gtest.h"
 #include "minidump/minidump_extensions.h"
 #include "minidump/minidump_file_writer.h"
 #include "minidump/minidump_stream_writer.h"
 #include "minidump/minidump_test_util.h"
 #include "util/file/string_file_writer.h"
 
+namespace crashpad {
+namespace test {
 namespace {
 
-using namespace crashpad;
-using namespace crashpad::test;
-
 const MinidumpStreamType kBogusStreamType =
     static_cast<MinidumpStreamType>(1234);
 
 // expected_streams is the expected number of streams in the file. The memory
 // list must be the last stream. If there is another stream, it must come first,
 // have stream type kBogusStreamType, and have zero-length data.
 void GetMemoryListStream(const std::string& file_contents,
                          const MINIDUMP_MEMORY_LIST** memory_list,
                          const uint32_t expected_streams) {
   const size_t kDirectoryOffset = sizeof(MINIDUMP_HEADER);
@@ skipping 339 matching lines @@
                           memory_list->MemoryRanges[0].Memory.DataSize;
     ExpectMemoryDescriptorAndContents(&expected,
                                       &memory_list->MemoryRanges[1],
                                       file_writer.string(),
                                       kValue2,
                                       true);
   }
 }
 
 }  // namespace
+}  // namespace test
+}  // namespace crashpad