Remove thread restriction of fileapi::FileSystemContext::ResolveURL.

webkit/browser/fileapi/file_system_context.h

Index: webkit/browser/fileapi/file_system_context.h
diff --git a/webkit/browser/fileapi/file_system_context.h b/webkit/browser/fileapi/file_system_context.h
index ba91af7ef97b9510c00018581b385c2a5988d990..a89b4728ac2ce778d9de111d2d55c57f6fa5851e 100644
--- a/webkit/browser/fileapi/file_system_context.h
+++ b/webkit/browser/fileapi/file_system_context.h
@@ -188,10 +188,15 @@ class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemContext
       OpenFileSystemCallback;
 
   // Used for ResolveURL.
+  enum ResolvedEntryType {
+    RESOLVED_ENTRY_FILE,
+    RESOLVED_ENTRY_DIRECTORY,
+    RESOLVED_ENTRY_NOT_FOUND,
+  };
   typedef base::Callback<void(base::File::Error result,
                               const FileSystemInfo& info,
                               const base::FilePath& file_path,
-                              bool is_directory)> ResolveURLCallback;
+                              ResolvedEntryType type)> ResolveURLCallback;
 
   // Used for DeleteFileSystem and OpenPluginPrivateFileSystem.
   typedef base::Callback<void(base::File::Error result)> StatusCallback;
@@ -208,8 +213,8 @@ class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemContext
       const OpenFileSystemCallback& callback);
 
   // Opens the filesystem for the given |url| as read-only, and then checks the
-  // existence of the file entry referred by the URL. This should be called on
-  // the IO thread.
+  // existence of the file entry referred by the URL. Can be called from any
+  // thread with a message loop. |callback| is invoked on the caller thread.

[kinuko, 2014/04/21 08:56:02]

So the new contract is: this returns OK if the given URL is 'resolvable', and
also returns ResolvedEntryType based on the actual resolved entry type... is
that the objective?  If so could we update the method comment to document that?

[kinaba, 2014/04/21 09:21:59]

Exactly. Updated the comment.

   void ResolveURL(
       const FileSystemURL& url,
       const ResolveURLCallback& callback);