Revert of Change mojo_public_bindings_unittests to use chromium environment.

third_party/mojo/src/mojo/public/cpp/bindings/tests/map_unittest.cc

Index: third_party/mojo/src/mojo/public/cpp/bindings/tests/map_unittest.cc
diff --git a/third_party/mojo/src/mojo/public/cpp/bindings/tests/map_unittest.cc b/third_party/mojo/src/mojo/public/cpp/bindings/tests/map_unittest.cc
index 5b049a87a02fdd53e9a14f2ba08a090e87eade47..44100a41072fcbca6bd3c885b769b365402217b3 100644
--- a/third_party/mojo/src/mojo/public/cpp/bindings/tests/map_unittest.cc
+++ b/third_party/mojo/src/mojo/public/cpp/bindings/tests/map_unittest.cc
@@ -10,6 +10,7 @@
 #include "mojo/public/cpp/bindings/map.h"
 #include "mojo/public/cpp/bindings/string.h"
 #include "mojo/public/cpp/bindings/tests/container_test_util.h"
+#include "mojo/public/cpp/environment/environment.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
@@ -35,7 +36,13 @@
 
 const size_t kStringIntDataSize = 4;
 
-using MapTest = testing::Test;
+class MapTest : public testing::Test {
+ public:
+  ~MapTest() override {}
+
+ private:
+  Environment env_;
+};
 
 // Tests that basic Map operations work.
 TEST_F(MapTest, InsertWorks) {