Support cross-profile copy between Chrome OS Google Drive folders.

chrome/browser/chromeos/drive/fileapi/fileapi_worker.h

Index: chrome/browser/chromeos/drive/fileapi/fileapi_worker.h
diff --git a/chrome/browser/chromeos/drive/fileapi/fileapi_worker.h b/chrome/browser/chromeos/drive/fileapi/fileapi_worker.h
index a33fece4f0bf37a42f31d73acbfba1e7ecf36f5c..5bf7b215226300d63a1eb805be801d7629781ea6 100644
--- a/chrome/browser/chromeos/drive/fileapi/fileapi_worker.h
+++ b/chrome/browser/chromeos/drive/fileapi/fileapi_worker.h
@@ -34,6 +34,7 @@ class FilePath;
 
 namespace fileapi {
 struct DirectoryEntry;
+class FileSystemURL;
 }  // namespace fileapi
 
 namespace drive {
@@ -69,6 +70,11 @@ typedef base::Callback<
          base::PlatformFile platform_file,
          const base::Closure& close_callback)> OpenFileCallback;
 
+// Gets the profile of the Drive entry pointed by |url|. Used as
+// FileSystemGetter callback by binding an URL on the IO thread and passing to
+// the UI thread.
+FileSystemInterface* GetFileSystemFromUrl(const fileapi::FileSystemURL& url);
+
 // Runs |file_system_getter| to obtain the instance of FileSystemInstance,
 // and then runs |callback| with it.
 // If |file_system_getter| returns NULL, runs |error_callback| instead.