gdata: Support mounting archive files in GData cache.

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 99ff2729e1618d30dac42e933e0a8fecf6d97620..2142d02c2d15655ca1b9424707747d10cbfc90f3 100644
--- a/chrome/browser/chromeos/gdata/mock_gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/mock_gdata_file_system.h
@@ -66,6 +66,7 @@ class MockGDataFileSystem : public GDataFileSystemInterface {
                                    const GetCacheStateCallback& callback));
   MOCK_METHOD2(GetFileInfoFromPath, bool(const FilePath& gdata_file_path,
                                          GDataFileProperties* properties));
+  MOCK_CONST_METHOD1(IsUnderGDataCacheDirectory, bool(const FilePath& path));
   MOCK_CONST_METHOD0(GetGDataCacheTmpDirectory, FilePath());
   MOCK_CONST_METHOD0(GetGDataTempDownloadFolderPath, FilePath());
   MOCK_CONST_METHOD0(GetGDataTempDocumentFolderPath, FilePath());
@@ -81,6 +82,9 @@ class MockGDataFileSystem : public GDataFileSystemInterface {
   MOCK_METHOD3(SetPinState, void(const FilePath&,
                                  bool,
                                  const FileOperationCallback& callback));
+  MOCK_METHOD3(SetMountedState, void(const FilePath&,
+                                     bool,
+                                     const SetMountedStateCallback& callback));
   MOCK_METHOD4(AddUploadedFile, void(const FilePath& file,
                                      DocumentEntry* entry,
                                      const FilePath& file_content_path,