Update bookmark bar folder icons to MD; vectorize.

chrome/browser/ui/bookmarks/bookmark_utils.h

Index: chrome/browser/ui/bookmarks/bookmark_utils.h
diff --git a/chrome/browser/ui/bookmarks/bookmark_utils.h b/chrome/browser/ui/bookmarks/bookmark_utils.h
index b9682a76fdbb314dbd19b24bf8b6566446ae91bf..59388a4cf608cd71c322270c55faa7287ad7a11f 100644
--- a/chrome/browser/ui/bookmarks/bookmark_utils.h
+++ b/chrome/browser/ui/bookmarks/bookmark_utils.h
@@ -28,6 +28,10 @@ class PageNavigator;
 class WebContents;
 }
 
+namespace gfx {
+class ImageSkia;
+}
+
 namespace ui {
 class DropTargetEvent;
 }
@@ -146,6 +150,13 @@ bool IsValidBookmarkDropLocation(Profile* profile,
                                  const bookmarks::BookmarkNode* drop_parent,
                                  int index);
 
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
+// TODO(estade): If Mac wants to use these, return gfx::Image instead.
+gfx::ImageSkia GetBookmarkFolderIcon();
+gfx::ImageSkia GetBookmarkSupervisedFolderIcon();
+gfx::ImageSkia GetBookmarkManagedFolderIcon();
+#endif
+
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_UTILS_H_