Remove requirement that mojo::Environment be instantiated.

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

 // Copyright 2015 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 "build/build_config.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/string.h"
-#include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/system/message_pipe.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/sample_interfaces.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 //
 // The tests in this file are designed to test the interaction between a
 // Callback and its associated Binding. If a Callback is deleted before
 // being used we DCHECK fail--unless the associated Binding has already
@@ skipping 93 matching lines @@
  public:
   ~BindingCallbackTest() override {}
 
  protected:
   int32_t last_client_callback_value_seen_;
   sample::ProviderPtr interface_ptr_;
 
   void PumpMessages() { loop_.RunUntilIdle(); }
 
  private:
-  Environment env_;
   RunLoop loop_;
 };
 
 // Tests that the InterfacePtr and the Binding can communicate with each
 // other normally.
 TEST_F(BindingCallbackTest, Basic) {
   // Create the ServerImpl and the Binding.
   InterfaceImpl server_impl;
   Binding<sample::Provider> binding(&server_impl, GetProxy(&interface_ptr_));
 
@@ skipping 157 matching lines @@
   // Delete the callback without running it. This should cause a crash in debug
   // builds due to a DCHECK.
   EXPECT_DEATH_IF_SUPPORTED(server_impl.DeleteCallback(),
                             "Check failed: !callback_was_dropped.");
 #endif
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo