Add extensions BookmarkModel observer automatically when manifest has bookmarks permission.

chrome/browser/extensions/extensions_service.cc

Index: chrome/browser/extensions/extensions_service.cc
diff --git a/chrome/browser/extensions/extensions_service.cc b/chrome/browser/extensions/extensions_service.cc
index 4a8b7c3bedbcd837c7eea4171da6711b4ab4b5de..9caf78ba22a3ef2bd2fefe5d3bab63a31cca7d71 100644
--- a/chrome/browser/extensions/extensions_service.cc
+++ b/chrome/browser/extensions/extensions_service.cc
@@ -14,6 +14,7 @@
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/debugger/devtools_manager.h"
 #include "chrome/browser/extensions/crx_installer.h"
+#include "chrome/browser/extensions/extension_bookmarks_module.h"
 #include "chrome/browser/extensions/extension_browser_event_router.h"
 #include "chrome/browser/extensions/extension_dom_ui.h"
 #include "chrome/browser/extensions/extension_file_util.h"
@@ -584,6 +585,10 @@ void ExtensionsService::OnExtensionLoaded(Extension* extension,
         if (extension->HasApiPermission(Extension::kTabPermission)) {
           ExtensionBrowserEventRouter::GetInstance()->Init();
         }
+        if (extension->HasApiPermission(Extension::kBookmarkPermission)) {
+          ExtensionBookmarkEventRouter::GetSingleton()->Observe(
+              profile_->GetBookmarkModel());
+        }
 
         if (extension->location() != Extension::LOAD)
           extension_prefs_->MigrateToPrefs(extension);