Mechanical change to allow the co-existance of std::string with a global ::string class

client/linux/minidump_writer/linux_core_dumper_unittest.cc

 // Copyright (c) 2012, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 12 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // linux_core_dumper_unittest.cc:
 // Unit tests for google_breakpad::LinuxCoreDumoer.
 
+#include <string>
+
 #include "breakpad_googletest_includes.h"
 #include "client/linux/minidump_writer/linux_core_dumper.h"
 #include "common/linux/tests/crash_generator.h"
+#include "common/using_std_string.h"
 
-using std::string;
 using namespace google_breakpad;
 
 TEST(LinuxCoreDumperTest, BuildProcPath) {
   const pid_t pid = getpid();
   const char procfs_path[] = "/procfs_copy";
   LinuxCoreDumper dumper(getpid(), "core_file", procfs_path);
 
   char maps_path[NAME_MAX] = "";
   char maps_path_expected[NAME_MAX];
   snprintf(maps_path_expected, sizeof(maps_path_expected),
@@ skipping 52 matching lines @@
   EXPECT_EQ(crash_generator.GetThreadId(kCrashThread),
             dumper.crash_thread());
 
   EXPECT_EQ(kNumOfThreads, dumper.threads().size());
   for (unsigned i = 0; i < kNumOfThreads; ++i) {
     ThreadInfo info;
     EXPECT_TRUE(dumper.GetThreadInfoByIndex(i, &info));
     EXPECT_EQ(getpid(), info.ppid);
   }
 }