Revert of Oilpan: Move MediaStreamSource, MediaStreamComponent and MediaStreamDescriptor

Source/platform/exported/WebMediaStreamSource.cpp

Index: Source/platform/exported/WebMediaStreamSource.cpp
diff --git a/Source/platform/exported/WebMediaStreamSource.cpp b/Source/platform/exported/WebMediaStreamSource.cpp
index 869f58e66b1b619818bbf60c164aa831cdebb5c7..8be20e9893fb674a6733c7f6672d472366e56e23 100644
--- a/Source/platform/exported/WebMediaStreamSource.cpp
+++ b/Source/platform/exported/WebMediaStreamSource.cpp
@@ -69,7 +69,7 @@
     m_owner = owner;
 }
 
-WebMediaStreamSource::WebMediaStreamSource(MediaStreamSource* mediaStreamSource)
+WebMediaStreamSource::WebMediaStreamSource(const PassRefPtr<MediaStreamSource>& mediaStreamSource)
     : m_private(mediaStreamSource)
 {
 }
@@ -88,6 +88,11 @@
 void WebMediaStreamSource::reset()
 {
     m_private.reset();
+}
+
+WebMediaStreamSource::operator PassRefPtr<MediaStreamSource>() const
+{
+    return m_private.get();
 }
 
 WebMediaStreamSource::operator MediaStreamSource*() const