Clean up potentially leaky use of base::DeletePointer.

media/audio/virtual_audio_input_stream.cc

Index: media/audio/virtual_audio_input_stream.cc
diff --git a/media/audio/virtual_audio_input_stream.cc b/media/audio/virtual_audio_input_stream.cc
index e586ac88618872d9790c0e3e1e30bb3a6ed5e408..5fd12a0f3a2ce66a44c7bbbf1547c65fa2f29f1b 100644
--- a/media/audio/virtual_audio_input_stream.cc
+++ b/media/audio/virtual_audio_input_stream.cc
@@ -50,9 +50,9 @@ class LoopbackAudioConverter : public AudioConverter::InputCallback {
 VirtualAudioInputStream::VirtualAudioInputStream(
     const AudioParameters& params,
     const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
-    const AfterCloseCallback& after_close_cb)
+    bool delete_on_close)
     : worker_task_runner_(worker_task_runner),
-      after_close_cb_(after_close_cb),
+      delete_on_close_(delete_on_close),
       callback_(NULL),
       buffer_(new uint8[params.GetBytesPerBuffer()]),
       params_(params),
@@ -152,13 +152,8 @@ void VirtualAudioInputStream::Close() {
 
   Stop();  // Make sure callback_ is no longer being used.
 
-  // If a non-null AfterCloseCallback was provided to the constructor, invoke it
-  // here.  The callback is moved to a stack-local first since |this| could be
-  // destroyed during Run().
-  if (!after_close_cb_.is_null()) {
-    const AfterCloseCallback cb = after_close_cb_;
-    after_close_cb_.Reset();
-    cb.Run(this);
+  if (delete_on_close_) {
+    delete this;
   }
 }