Make FileSystemContext respect StoragePartitions. filesystem:// urls will be properly isolated

chrome/browser/profiles/off_the_record_profile_impl.cc

Index: chrome/browser/profiles/off_the_record_profile_impl.cc
diff --git a/chrome/browser/profiles/off_the_record_profile_impl.cc b/chrome/browser/profiles/off_the_record_profile_impl.cc
index ca279e0368819315d677aa169a6a8fd0550e38e1..4f7ed06bcf7a23ca7973bec83ccccb983e916233 100644
--- a/chrome/browser/profiles/off_the_record_profile_impl.cc
+++ b/chrome/browser/profiles/off_the_record_profile_impl.cc
@@ -285,6 +285,12 @@ net::URLRequestContextGetter*
 }
 
 net::URLRequestContextGetter*
+OffTheRecordProfileImpl::GetMediaRequestContextForStoragePartition(
+    const std::string& partition_id) {
+  return GetRequestContextForIsolatedApp(partition_id);
+}
+
+net::URLRequestContextGetter*
     OffTheRecordProfileImpl::GetRequestContextForExtensions() {
   return io_data_.GetExtensionsRequestContextGetter();
 }