(2nd try) Add a helper class that keeps per-profile information for FileSystem API

chrome/browser/renderer_host/resource_message_filter.cc

Index: chrome/browser/renderer_host/resource_message_filter.cc
diff --git a/chrome/browser/renderer_host/resource_message_filter.cc b/chrome/browser/renderer_host/resource_message_filter.cc
index db9e6e4e1314db9a2b01b4bc586961fc1a87b640..bdef995a8389a9ba878afbb8f177eb9340a1230b 100644
--- a/chrome/browser/renderer_host/resource_message_filter.cc
+++ b/chrome/browser/renderer_host/resource_message_filter.cc
@@ -31,6 +31,7 @@
 #include "chrome/browser/download/download_file.h"
 #include "chrome/browser/extensions/extension_message_service.h"
 #include "chrome/browser/file_system/file_system_dispatcher_host.h"
+#include "chrome/browser/file_system/file_system_host_context.h"
 #include "chrome/browser/geolocation/geolocation_permission_context.h"
 #include "chrome/browser/geolocation/geolocation_dispatcher_host.h"
 #include "chrome/browser/gpu_process_host.h"
@@ -256,6 +257,7 @@ ResourceMessageFilter::ResourceMessageFilter(
           new device_orientation::DispatcherHost(this->id()))),
       ALLOW_THIS_IN_INITIALIZER_LIST(file_system_dispatcher_host_(
           new FileSystemDispatcherHost(this,
+              profile->GetFileSystemHostContext(),
               profile->GetHostContentSettingsMap()))),
       ALLOW_THIS_IN_INITIALIZER_LIST(blob_dispatcher_host_(
           new BlobDispatcherHost(profile->GetBlobStorageContext()))) {