Clean up potentially leaky use of base::DeletePointer.

content/browser/media/capture/web_contents_audio_input_stream_unittest.cc

Index: content/browser/media/capture/web_contents_audio_input_stream_unittest.cc
diff --git a/content/browser/media/capture/web_contents_audio_input_stream_unittest.cc b/content/browser/media/capture/web_contents_audio_input_stream_unittest.cc
index c1078085dfc4bd64fe66e369b13f2f4af493b175..dd533db31c6bdf6e2f6e3cd2c4a3ac8a89f45c4c 100644
--- a/content/browser/media/capture/web_contents_audio_input_stream_unittest.cc
+++ b/content/browser/media/capture/web_contents_audio_input_stream_unittest.cc
@@ -87,11 +87,8 @@ class MockVirtualAudioInputStream : public VirtualAudioInputStream {
  public:
   explicit MockVirtualAudioInputStream(
       const scoped_refptr<base::MessageLoopProxy>& worker_loop)
-      : VirtualAudioInputStream(TestAudioParameters(), worker_loop,
-                                VirtualAudioInputStream::AfterCloseCallback()),
-        real_(TestAudioParameters(), worker_loop,
-              base::Bind(&MockVirtualAudioInputStream::OnRealStreamHasClosed,
-                         base::Unretained(this))),
+      : VirtualAudioInputStream(TestAudioParameters(), worker_loop, false),
+        real_(TestAudioParameters(), worker_loop, false),
         real_stream_is_closed_(false) {
     // Set default actions of mocked methods to delegate to the concrete
     // implementation.
@@ -102,7 +99,7 @@ class MockVirtualAudioInputStream : public VirtualAudioInputStream {
     ON_CALL(*this, Stop())
         .WillByDefault(Invoke(&real_, &VirtualAudioInputStream::Stop));
     ON_CALL(*this, Close())
-        .WillByDefault(Invoke(&real_, &VirtualAudioInputStream::Close));
+        .WillByDefault(Invoke(this, &MockVirtualAudioInputStream::OnClose));
     ON_CALL(*this, GetMaxVolume())
         .WillByDefault(Invoke(&real_, &VirtualAudioInputStream::GetMaxVolume));
     ON_CALL(*this, SetVolume(_))
@@ -142,8 +139,8 @@ class MockVirtualAudioInputStream : public VirtualAudioInputStream {
                                         const AudioParameters&));
 
  private:
-  void OnRealStreamHasClosed(VirtualAudioInputStream* stream) {
-    DCHECK_EQ(&real_, stream);
+  void OnClose() {
+    real_.Close();
     DCHECK(!real_stream_is_closed_);
     real_stream_is_closed_ = true;
   }