Remove requirement that mojo::Environment be instantiated.

mojo/public/cpp/bindings/tests/handle_passing_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <utility>
 
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
-#include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/test_support/test_utils.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/sample_factory.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace test {
 namespace {
 
 const char kText1[] = "hello";
@@ skipping 118 matching lines @@
   Binding<sample::Factory> binding_;
 };
 
 class HandlePassingTest : public testing::Test {
  public:
   void TearDown() override { PumpMessages(); }
 
   void PumpMessages() { loop_.RunUntilIdle(); }
 
  private:
-  Environment env_;
   RunLoop loop_;
 };
 
 struct DoStuffCallback {
   DoStuffCallback(bool* got_response, std::string* got_text_reply)
       : got_response(got_response), got_text_reply(got_text_reply) {}
 
   void Run(sample::ResponsePtr response, const String& text_reply) const {
     *got_text_reply = text_reply;
 
@@ skipping 187 matching lines @@
 
   PumpMessages();  // Yield for results.
 
   EXPECT_EQ(std::string("object1"), name1);
   EXPECT_EQ(std::string("object2"), name2);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo