[WIP] Provided file system from NACL.

chrome/browser/chromeos/file_system_provider/provided_file_system.h

Index: chrome/browser/chromeos/file_system_provider/provided_file_system.h
diff --git a/chrome/browser/chromeos/file_system_provider/provided_file_system.h b/chrome/browser/chromeos/file_system_provider/provided_file_system.h
index 2cdf6db5e8af1647b52f8b7928a7f7162f2f5fa1..d94c51271e0bfa5282b7b1668dc5fac59c2fb3d0 100644
--- a/chrome/browser/chromeos/file_system_provider/provided_file_system.h
+++ b/chrome/browser/chromeos/file_system_provider/provided_file_system.h
@@ -31,13 +31,16 @@ namespace base {
 class FilePath;
 }  // namespace base
 
-namespace extensions {
-class EventRouter;
-}  // namespace extensions
-
 namespace chromeos {
 namespace file_system_provider {
 
+// Define a policy that gets specific routers
+template <int source = Source_Type::extension>
+struct SourcePolicy : Source_Traits<source> {
+  typedef typename Source_Traits<source>::EventRouterType EventRouterType;
+  EventRouterType* Get(Profile* profile);
+};
+
 class NotificationManagerInterface;
 
 // Automatically calls the |update_callback| after all of the callbacks created
@@ -73,7 +76,9 @@ class AutoUpdater : public base::RefCounted<AutoUpdater> {
 
 // Provided file system implementation. Forwards requests between providers and
 // clients.
-class ProvidedFileSystem : public ProvidedFileSystemInterface {
+template <int source = Source_Type::extension>
+class ProvidedFileSystem : public ProvidedFileSystemInterface,
+                           public SourcePolicy<source> {
  public:
   ProvidedFileSystem(Profile* profile,
                      const ProvidedFileSystemInfo& file_system_info);
@@ -81,7 +86,8 @@ class ProvidedFileSystem : public ProvidedFileSystemInterface {
 
   // Sets a custom event router. Used in unit tests to mock out the real
   // extension.
-  void SetEventRouterForTesting(extensions::EventRouter* event_router);
+  void SetEventRouterForTesting(
+      typename SourcePolicy<source>::EventRouterType* event_router);
 
   // Sets a custom notification manager. It will recreate the request manager,
   // so is must be called just after creating ProvideFileSystem instance.
@@ -232,8 +238,10 @@ class ProvidedFileSystem : public ProvidedFileSystemInterface {
       const storage::AsyncFileUtil::StatusCallback& callback,
       base::File::Error result);
 
-  Profile* profile_;                       // Not owned.
-  extensions::EventRouter* event_router_;  // Not owned. May be NULL.
+  // Not owned.
+  Profile* profile_;
+  // Not owned. May be NULL
+  typename SourcePolicy<source>::EventRouterType* event_router_;
   ProvidedFileSystemInfo file_system_info_;
   scoped_ptr<NotificationManagerInterface> notification_manager_;
   scoped_ptr<RequestManager> request_manager_;
@@ -242,8 +250,8 @@ class ProvidedFileSystem : public ProvidedFileSystemInterface {
   OpenedFiles opened_files_;
   ObserverList<ProvidedFileSystemObserver> observers_;
 
-  base::WeakPtrFactory<ProvidedFileSystem> weak_ptr_factory_;
-  DISALLOW_COPY_AND_ASSIGN(ProvidedFileSystem);
+  base::WeakPtrFactory<ProvidedFileSystem<source>> weak_ptr_factory_;
+  DISALLOW_COPY_AND_ASSIGN(ProvidedFileSystem<source>);
 };
 
 }  // namespace file_system_provider