gdata: Fix "save as pdf" to work on Google Drive.

chrome/browser/chromeos/gdata/mock_gdata_file_system.h

Index: chrome/browser/chromeos/gdata/mock_gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/mock_gdata_file_system.h b/chrome/browser/chromeos/gdata/mock_gdata_file_system.h
index 321bb4d30f538007e0d9e29713c9ad4ab74c93c4..13307c4d3ef148a0900832bb5c7d44238160ebd5 100644
--- a/chrome/browser/chromeos/gdata/mock_gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/mock_gdata_file_system.h
@@ -42,6 +42,9 @@ class MockGDataFileSystem : public GDataFileSystemInterface {
                               const OpenFileCallback& callback));
   MOCK_METHOD2(CloseFile, void(const FilePath& file_path,
                               const FileOperationCallback& callback));
+  MOCK_METHOD2(PrepareWritableFileAndRun,
+               void(const FilePath& file_path,
+                    const OpenFileCallback& callback));
   MOCK_METHOD3(Copy, void(const FilePath& src_file_path,
                           const FilePath& dest_file_path,
                           const FileOperationCallback& callback));