Implementation of shared worker code path for WebView file system permission.

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index e8da55e8aff9564e9d0bc38b019db8b253085113..cd1ad789e81a58c7ca2384ef14479349c4a0fc83 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -149,11 +149,12 @@ bool ContentBrowserClient::AllowWorkerDatabase(
   return true;
 }
 
-bool ContentBrowserClient::AllowWorkerFileSystem(
+void ContentBrowserClient::RequestWorkerFileSystemAccessSync(
     const GURL& url,
     ResourceContext* context,
-    const std::vector<std::pair<int, int> >& render_frames) {
-  return true;
+    const std::vector<std::pair<int, int> >& render_frames,
+    base::Callback<void(bool)> callback) {
+  callback.Run(true);
 }
 
 bool ContentBrowserClient::AllowWorkerIndexedDB(