Move MediaDeviceIDSalt from ProfileIOData to ProfileImpl.

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 84c5eb8d6fe0343c214c767ea0479b131fbe3cc9..d3f065309aed028fdc81d7fb694b94bb35225f77 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -44,6 +44,7 @@
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
+#include "chrome/browser/media/media_device_id_salt.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/net/proxy_service_factory.h"
 #include "chrome/browser/permissions/permission_manager.h"
@@ -562,6 +563,8 @@ void ProfileImpl::DoFinalInit() {
       base::Bind(&ProfileImpl::UpdateIsEphemeralInStorage,
                  base::Unretained(this)));
 
+  media_device_id_salt_ = new MediaDeviceIDSalt(prefs_.get());
+
   // It would be nice to use PathService for fetching this directory, but
   // the cache directory depends on the profile directory, which isn't available
   // to PathService.
@@ -1093,6 +1096,10 @@ void ProfileImpl::RegisterInProcessServices(StaticServiceMap* services) {
       std::make_pair(identity::mojom::kServiceName, identity_service_info));
 }
 
+std::string ProfileImpl::GetMediaDeviceIDSalt() {
+  return media_device_id_salt_->GetSalt();
+}
+
 bool ProfileImpl::IsSameProfile(Profile* profile) {
   if (profile == static_cast<Profile*>(this))
     return true;