[Mac] Add cocoa implementation for sidebar extension action support

chrome/browser/ui/cocoa/view_id_util_browsertest.mm

Index: chrome/browser/ui/cocoa/view_id_util_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/view_id_util_browsertest.mm b/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
index dafee4c58c99d628af81e730c9b4913c3437350b..7adb7f00cfa816b0f6cc1ecb94648f26fa911886 100644
--- a/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
+++ b/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
@@ -14,6 +14,8 @@
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/view_id_util.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/view_ids.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "components/bookmarks/browser/bookmark_model.h"
@@ -67,13 +69,10 @@ class ViewIDTest : public InProcessBrowserTest {
 
     for (int i = VIEW_ID_TOOLBAR; i < VIEW_ID_PREDEFINED_COUNT; ++i) {
       // Mac implementation does not support following ids yet.
-      if (i == VIEW_ID_STAR_BUTTON ||
-          i == VIEW_ID_CONTENTS_SPLIT ||
-          i == VIEW_ID_BROWSER_ACTION ||
-          i == VIEW_ID_FEEDBACK_BUTTON ||
-          i == VIEW_ID_SCRIPT_BUBBLE ||
-          i == VIEW_ID_MIC_SEARCH_BUTTON ||
-          i == VIEW_ID_TRANSLATE_BUTTON) {
+      if (i == VIEW_ID_STAR_BUTTON || i == VIEW_ID_BROWSER_ACTION ||
+          i == VIEW_ID_SIDE_BAR_SPLIT || i == VIEW_ID_SIDE_BAR_VIEW ||
+          i == VIEW_ID_FEEDBACK_BUTTON || i == VIEW_ID_SCRIPT_BUBBLE ||
+          i == VIEW_ID_MIC_SEARCH_BUTTON || i == VIEW_ID_TRANSLATE_BUTTON) {
         continue;
       }