Stop refcounting URLRequestContext.

content/test/webrtc_audio_device_test.cc

Index: content/test/webrtc_audio_device_test.cc
diff --git a/content/test/webrtc_audio_device_test.cc b/content/test/webrtc_audio_device_test.cc
index c9e72ec65134f46a2f3848054b61e22dfda45cc5..496792d267b823ede353a361d12e19c1b8287f35 100644
--- a/content/test/webrtc_audio_device_test.cc
+++ b/content/test/webrtc_audio_device_test.cc
@@ -168,7 +168,7 @@ void WebRTCAudioDeviceTest::InitializeIOThread(const char* thread_name) {
   audio_manager_.reset(media::AudioManager::Create());
 
   // Populate our resource context.
-  test_request_context_ = new TestURLRequestContext();
+  test_request_context_.reset(new TestURLRequestContext());
   resource_context_->set_request_context(test_request_context_.get());
   media_observer_.reset(new MockMediaObserver());
 
@@ -183,7 +183,7 @@ void WebRTCAudioDeviceTest::UninitializeIOThread() {
   resource_context_.reset();
 
   audio_manager_.reset();
-  test_request_context_ = NULL;
+  test_request_context_.reset();
   initialize_com_.reset();
 }