Add RegisterMountPointProvider and TestMountPointProvider for testing

webkit/fileapi/file_system_context.h

Index: webkit/fileapi/file_system_context.h
diff --git a/webkit/fileapi/file_system_context.h b/webkit/fileapi/file_system_context.h
index 472bf8aad216f8ba1fa1034e5b97791e9eb375df..c6f6f7a2233ab86919d1da562637e6c478b0fa6a 100644
--- a/webkit/fileapi/file_system_context.h
+++ b/webkit/fileapi/file_system_context.h
@@ -5,6 +5,7 @@
 #ifndef WEBKIT_FILEAPI_FILE_SYSTEM_CONTEXT_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_CONTEXT_H_
 
+#include <map>
 #include <string>
 
 #include "base/callback.h"
@@ -135,6 +136,11 @@ class FileSystemContext
       const GURL& url,
       int64 offset);
 
+  // Register a filesystem provider. The ownership of |provider| is
+  // transferred to this instance.
+  void RegisterMountPointProvider(FileSystemType type,
+                                  FileSystemMountPointProvider* provider);
+
  private:
   friend struct DefaultContextDeleter;
   friend class base::DeleteHelper<FileSystemContext>;
@@ -147,11 +153,14 @@ class FileSystemContext
 
   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
 
-  // Mount point providers.
+  // Regular mount point providers.
   scoped_ptr<SandboxMountPointProvider> sandbox_provider_;
   scoped_ptr<IsolatedMountPointProvider> isolated_provider_;
   scoped_ptr<ExternalFileSystemMountPointProvider> external_provider_;
 
+  // Registered mount point providers.
+  std::map<FileSystemType, FileSystemMountPointProvider*> provider_map_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemContext);
 };