Mojo Bindings: Reset EDK error callback in ReportBadMessageTest::TearDown

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

 // Copyright 2016 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 "base/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "mojo/edk/embedder/embedder.h"
@@ skipping 51 matching lines @@
   ReportBadMessageTest() {}
 
   void SetUp() override {
     mojo::edk::SetDefaultProcessErrorCallback(
         base::Bind(&ReportBadMessageTest::OnProcessError,
                    base::Unretained(this)));
 
     impl_.BindImpl(GetProxy(&proxy_));
   }
 
+  void TearDown() override {
+    mojo::edk::SetDefaultProcessErrorCallback(
+        mojo::edk::ProcessErrorCallback());
+  }
+
   TestBadMessages* proxy() { return proxy_.get(); }
 
   TestBadMessagesImpl* impl() { return &impl_; }
 
   void SetErrorHandler(const base::Closure& handler) {
     error_handler_ = handler;
   }
 
  private:
   void OnProcessError(const std::string& error) {
@@ skipping 98 matching lines @@
   }
 
   EXPECT_FALSE(error);
   bad_message_callback.Run("nope nope nope");
   EXPECT_TRUE(error);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo