This adds some GData private API to the file manager

chrome/browser/chromeos/extensions/file_browser_private_api.h

Index: chrome/browser/chromeos/extensions/file_browser_private_api.h
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.h b/chrome/browser/chromeos/extensions/file_browser_private_api.h
index a5d463ecc977e7ce1958579e46775040a187584c..2ade0c3a200bd83ba8a163749cb271d0d14a81e6 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.h
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.h
@@ -367,4 +367,22 @@ class FileDialogStringsFunction : public SyncExtensionFunction {
   DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.getStrings");
 };
 
+// Retrieve property information for multiple files, returning a list of the
+// same length as the input list of file URLs.  If a particular file has an
+// error, then return a dictionary with the key "error" set to the error number
+// (base::PlatformFileError) for that entry in the returned list.
+class GetGDataFilePropertiesFunction
+    : public FileBrowserFunction {
+ public:
+  GetGDataFilePropertiesFunction();
+
+ protected:
+  virtual ~GetGDataFilePropertiesFunction();
+
+  // AsyncExtensionFunction overrides.
+  virtual bool RunImpl() OVERRIDE;
+
+ private:
+  DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.getGDataFileProperties");
+};
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_