WeakPtr destruction order cleanup: media edition.

content/renderer/media/webaudiosourceprovider_impl.cc

Index: content/renderer/media/webaudiosourceprovider_impl.cc
diff --git a/content/renderer/media/webaudiosourceprovider_impl.cc b/content/renderer/media/webaudiosourceprovider_impl.cc
index 47bd384c239df082e9d1cfedf11ee5f905582e72..48bcf1cd407c8fdce92414f760b382107499d997 100644
--- a/content/renderer/media/webaudiosourceprovider_impl.cc
+++ b/content/renderer/media/webaudiosourceprovider_impl.cc
@@ -48,15 +48,14 @@ class AutoTryLock {
 
 WebAudioSourceProviderImpl::WebAudioSourceProviderImpl(
     const scoped_refptr<media::AudioRendererSink>& sink)
-    : weak_this_(this),
-      channels_(0),
+    : channels_(0),
       sample_rate_(0),
       volume_(1.0),
       state_(kStopped),
       renderer_(NULL),
       client_(NULL),
-      sink_(sink) {
-}
+      sink_(sink),
+      weak_factory_(this) {}
 
 WebAudioSourceProviderImpl::~WebAudioSourceProviderImpl() {
 }
@@ -71,9 +70,8 @@ void WebAudioSourceProviderImpl::setClient(
     // The client will now take control by calling provideInput() periodically.
     client_ = client;
 
-    set_format_cb_ = media::BindToCurrentLoop(
-        base::Bind(&WebAudioSourceProviderImpl::OnSetFormat,
-                   weak_this_.GetWeakPtr()));
+    set_format_cb_ = media::BindToCurrentLoop(base::Bind(
+        &WebAudioSourceProviderImpl::OnSetFormat, weak_factory_.GetWeakPtr()));
 
     // If |renderer_| is set, then run |set_format_cb_| to send |client_|
     // the current format info. If |renderer_| is not set, then |set_format_cb_|