Integrate external mount points to IsolatedContext

webkit/fileapi/file_system_context.cc

Index: webkit/fileapi/file_system_context.cc
diff --git a/webkit/fileapi/file_system_context.cc b/webkit/fileapi/file_system_context.cc
index d76ad78acb1dd039a5ab6804e71b2523ce97a8d7..0d62a08308eb9a31b0104e9436014496a03936e8 100644
--- a/webkit/fileapi/file_system_context.cc
+++ b/webkit/fileapi/file_system_context.cc
@@ -113,12 +113,19 @@ FileSystemMountPointProvider* FileSystemContext::GetMountPointProvider(
     case kFileSystemTypePersistent:
       return sandbox_provider_.get();
     case kFileSystemTypeExternal:
+    case kFileSystemTypeDrive:
       return external_provider_.get();
     case kFileSystemTypeIsolated:
     case kFileSystemTypeDragged:
     case kFileSystemTypeNativeMedia:
     case kFileSystemTypeDeviceMedia:
       return isolated_provider_.get();
+    case kFileSystemTypeNativeLocal:
+#if defined(OS_CHROMEOS)
+      return external_provider_.get();
+#else
+      return isolated_provider_.get();
+#endif
     default:
       if (provider_map_.find(type) != provider_map_.end())
         return provider_map_.find(type)->second;