Revert of Oilpan: Move MediaStreamSource, MediaStreamComponent and MediaStreamDescriptor

Source/platform/mediastream/MediaStreamComponent.cpp

Index: Source/platform/mediastream/MediaStreamComponent.cpp
diff --git a/Source/platform/mediastream/MediaStreamComponent.cpp b/Source/platform/mediastream/MediaStreamComponent.cpp
index 36e8645a843d42b061c5243ad3f34d9507c19a18..43bc57d0c4d4148621eedb36f73676f052e7c74a 100644
--- a/Source/platform/mediastream/MediaStreamComponent.cpp
+++ b/Source/platform/mediastream/MediaStreamComponent.cpp
@@ -40,17 +40,17 @@
 
 namespace blink {
 
-MediaStreamComponent* MediaStreamComponent::create(MediaStreamSource* source)
+PassRefPtr<MediaStreamComponent> MediaStreamComponent::create(PassRefPtr<MediaStreamSource> source)
 {
-    return new MediaStreamComponent(createCanonicalUUIDString(), source);
+    return adoptRef(new MediaStreamComponent(createCanonicalUUIDString(), source));
 }
 
-MediaStreamComponent* MediaStreamComponent::create(const String& id, MediaStreamSource* source)
+PassRefPtr<MediaStreamComponent> MediaStreamComponent::create(const String& id, PassRefPtr<MediaStreamSource> source)
 {
-    return new MediaStreamComponent(id, source);
+    return adoptRef(new MediaStreamComponent(id, source));
 }
 
-MediaStreamComponent::MediaStreamComponent(const String& id, MediaStreamSource* source)
+MediaStreamComponent::MediaStreamComponent(const String& id, PassRefPtr<MediaStreamSource> source)
     : m_source(source)
     , m_id(id)
     , m_enabled(true)
@@ -88,10 +88,5 @@
 }
 #endif // #if ENABLE(WEB_AUDIO)
 
-void MediaStreamComponent::trace(Visitor* visitor)
-{
-    visitor->trace(m_source);
-}
-
 } // namespace blink