Removing singleton property of MediaStreamManager and creating thread first when needed.

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index eddce0d4508c39a0ac478e491bdcfe6945797ccf..ae259e45e96041e2d4b6b127e84f18faf9dbfdf9 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -34,6 +34,10 @@ namespace fileapi {
 class FileSystemContext;
 }  // namespace fileapi
 
+namespace media_stream {
+class MediaStreamManager;
+}  // namespace media_stream
+
 namespace net {
 class CookieStore;
 class DnsCertProvenanceChecker;
@@ -265,6 +269,7 @@ class ProfileIOData {
   mutable scoped_refptr<fileapi::FileSystemContext> file_system_context_;
   mutable scoped_refptr<quota::QuotaManager> quota_manager_;
   mutable scoped_refptr<HostZoomMap> host_zoom_map_;
+  mutable scoped_refptr<media_stream::MediaStreamManager> media_stream_manager_;
 
   // TODO(willchan): Remove from ResourceContext.
   mutable scoped_refptr<ExtensionInfoMap> extension_info_map_;