Gallery: Add debugMe method to Gallery.

chrome/browser/chromeos/file_manager/gallery_jstest.cc

Index: chrome/browser/chromeos/file_manager/gallery_jstest.cc
diff --git a/chrome/browser/chromeos/file_manager/gallery_jstest.cc b/chrome/browser/chromeos/file_manager/gallery_jstest.cc
index f2f1bb4ff7848350ff3541912e48f3db46005ccb..d90f3a9e65c34025395efd972b0b6c2a91894a50 100644
--- a/chrome/browser/chromeos/file_manager/gallery_jstest.cc
+++ b/chrome/browser/chromeos/file_manager/gallery_jstest.cc
@@ -44,3 +44,8 @@ IN_PROC_BROWSER_TEST_F(GalleryJsTest, GalleryDataModelTest) {
   RunTest(base::FilePath(
       FILE_PATH_LITERAL("gallery_data_model_unittest.html")));
 }
+
+IN_PROC_BROWSER_TEST_F(GalleryJsTest, MosaicModeTest) {
+  RunTest(base::FilePath(
+      FILE_PATH_LITERAL("mosaic_mode_unittest.html")));
+}