Move TestBookmarkClient into bookmarks namespace.

components/bookmarks/browser/bookmark_model.h

Index: components/bookmarks/browser/bookmark_model.h
diff --git a/components/bookmarks/browser/bookmark_model.h b/components/bookmarks/browser/bookmark_model.h
index b8d9d7e7bac96528965a168a4c2b309c635f8e16..4181851c069d37b7d0b43cda3f393eadafd6fb13 100644
--- a/components/bookmarks/browser/bookmark_model.h
+++ b/components/bookmarks/browser/bookmark_model.h
@@ -38,6 +38,7 @@ class BookmarkIndex;
 class BookmarkLoadDetails;
 class BookmarkStorage;
 class ScopedGroupBookmarkActions;
+class TestBookmarkClient;
 struct BookmarkMatch;
 }
 
@@ -45,10 +46,6 @@ namespace favicon_base {
 struct FaviconImageResult;
 }
 
-namespace test {
-class TestBookmarkClient;
-}
-
 // BookmarkModel --------------------------------------------------------------
 
 // BookmarkModel provides a directed acyclic graph of URLs and folders.
@@ -289,7 +286,7 @@ class BookmarkModel : public KeyedService {
   friend class bookmarks::BookmarkCodecTest;
   friend class bookmarks::BookmarkStorage;
   friend class bookmarks::ScopedGroupBookmarkActions;
-  friend class test::TestBookmarkClient;
+  friend class bookmarks::TestBookmarkClient;
 
   // Used to order BookmarkNodes by URL.
   class NodeURLComparator {