Get generate_dump compiling on Windows

util/file/basename_posix.cc

Index: util/file/basename_posix.cc
diff --git a/test/thread.cc b/util/file/basename_posix.cc
similarity index 78%
copy from test/thread.cc
copy to util/file/basename_posix.cc
index baeeafa632152c4edd71aa04be6a4d32a0824d2e..de37b69ab80d0d54b2bee95ca30adcd197ee0ab9 100644
--- a/test/thread.cc
+++ b/util/file/basename_posix.cc
@@ -12,19 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "test/thread.h"
+#include "util/file/basename.h"
 
-#include "gtest/gtest.h"
+#include <libgen.h>
 
 namespace crashpad {
-namespace test {
 
-Thread::Thread() : platform_thread_(0) {
+std::string Basename(const std::string& path) {
+  std::string copy(path);
+  return std::string(basename(&copy[0]));
 }
 
-Thread::~Thread() {
-  EXPECT_FALSE(platform_thread_);
-}
-
-}  // namespace test
 }  // namespace crashpad