Move bookmarks extension api implementation to bookmarks dir

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 21dfbbdc23960e17c8e3a4c62eb750c9c92586fe..3804e0274d68667a5d9772bd37dca37d04d67ead 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1163,6 +1163,7 @@
         'browser/bookmarks/bookmark_codec_unittest.cc',
         'browser/bookmarks/bookmark_context_menu_controller_unittest.cc',
         'browser/bookmarks/bookmark_expanded_state_tracker_unittest.cc',
+        'browser/bookmarks/bookmark_extension_helpers_unittest.cc',
         'browser/bookmarks/bookmark_html_writer_unittest.cc',
         'browser/bookmarks/bookmark_index_unittest.cc',
         'browser/bookmarks/bookmark_model_test_utils.cc',
@@ -2284,6 +2285,8 @@
         'browser/autocomplete/autocomplete_browsertest.cc',
         'browser/autofill/form_structure_browsertest.cc',
         'browser/automation/automation_tab_helper_browsertest.cc',
+        'browser/bookmarks/bookmark_extension_apitest.cc',
+        'browser/bookmarks/bookmark_manager_extension_apitest.cc',
         'browser/browsing_data_database_helper_browsertest.cc',
         'browser/browsing_data_helper_browsertest.h',
         'browser/browsing_data_indexed_db_helper_browsertest.cc',
@@ -2365,9 +2368,6 @@
         'browser/extensions/extension_apitest.cc',
         'browser/extensions/extension_apitest.h',
         'browser/extensions/extension_apitest_apitest.cc',
-        'browser/extensions/extension_bookmarks_apitest.cc',
-        'browser/extensions/extension_bookmarks_unittest.cc',
-        'browser/extensions/extension_bookmark_manager_apitest.cc',
         'browser/extensions/extension_browsertest.cc',
         'browser/extensions/extension_browsertest.h',
         'browser/extensions/extension_browsertests_misc.cc',