Implement <webview>.addContentScript/removeContentScript API [1]

extensions/browser/declarative_user_script_master.cc

Index: extensions/browser/declarative_user_script_master.cc
diff --git a/extensions/browser/declarative_user_script_master.cc b/extensions/browser/declarative_user_script_master.cc
index f16157fce831519bb91b01a9a16ac4e821cfcd29..130e9ba4b87c54b8805fc6128871adae40f315bf 100644
--- a/extensions/browser/declarative_user_script_master.cc
+++ b/extensions/browser/declarative_user_script_master.cc
@@ -28,12 +28,22 @@ void DeclarativeUserScriptMaster::AddScript(const UserScript& script) {
   loader_.AddScripts(set);
 }
 
+void DeclarativeUserScriptMaster::AddScripts(
+    const std::set<UserScript>& scripts) {
+  loader_.AddScripts(scripts);
+}
+
 void DeclarativeUserScriptMaster::RemoveScript(const UserScript& script) {
   std::set<UserScript> set;
   set.insert(script);
   loader_.RemoveScripts(set);
 }
 
+void DeclarativeUserScriptMaster::RemoveScripts(
+    const std::set<UserScript>& scripts) {
+  loader_.RemoveScripts(scripts);
+}
+
 void DeclarativeUserScriptMaster::ClearScripts() {
   loader_.ClearScripts();
 }