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

extensions/browser/declarative_user_script_master.h

Index: extensions/browser/declarative_user_script_master.h
diff --git a/extensions/browser/declarative_user_script_master.h b/extensions/browser/declarative_user_script_master.h
index c7a23c3f6b2ec692759d8753064f80b6df65e257..f5730396099498c46c1ead26a1aed2670e975992 100644
--- a/extensions/browser/declarative_user_script_master.h
+++ b/extensions/browser/declarative_user_script_master.h
@@ -30,10 +30,18 @@ class DeclarativeUserScriptMaster {
   // script load is in progress.
   void AddScript(const UserScript& script);
 
+  // Adds a set of scripts to shared memory region. This may not happen right
+  // away if a script load is in progress.
+  void AddScripts(const std::set<UserScript>& scripts);
+
   // Removes script from shared memory region. This may not happen right away if
   // a script load is in progress.
   void RemoveScript(const UserScript& script);
 
+  // Removes a set of scripts from shared memory region. This may not happen
+  // right away if a script load is in progress.
+  void RemoveScripts(const std::set<UserScript>& scripts);
+
   // Removes all scripts from shared memory region. This may not happen right
   // away if a script load is in progress.
   void ClearScripts();