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

extensions/renderer/user_script_injector.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_RENDERER_USER_SCRIPT_INJECTOR_H_
 #define EXTENSIONS_RENDERER_USER_SCRIPT_INJECTOR_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_observer.h"
 #include "extensions/common/user_script.h"
 #include "extensions/renderer/script_injection.h"
 #include "extensions/renderer/user_script_set.h"
 
 class InjectionHost;
 
 namespace blink {
 class WebFrame;
 }
 
 namespace extensions {
 
 // A ScriptInjector for UserScripts.
 class UserScriptInjector : public ScriptInjector,
                            public UserScriptSet::Observer {
  public:
   UserScriptInjector(const UserScript* user_script,
                      UserScriptSet* user_script_set,
-                     bool is_declarative);
+                     bool is_declarative,
+                     bool has_guest_content_script);
   ~UserScriptInjector() override;
 
  private:
   // UserScriptSet::Observer implementation.
   void OnUserScriptsUpdated(const std::set<HostID>& changed_hosts,
                             const std::vector<UserScript*>& scripts) override;
 
   // ScriptInjector implementation.
   UserScript::InjectionType script_type() const override;
   bool ShouldExecuteInChildFrames() const override;
@@ skipping 26 matching lines @@
   // deleted.
   int script_id_;
 
   // The associated host id, preserved for the same reason as |script_id|.
   HostID host_id_;
 
   // Indicates whether or not this script is declarative. This influences which
   // script permissions are checked before injection.
   bool is_declarative_;
 
+  // Indicates whether the injector belongs to a guest render process that has
+  // content scripts.
+  bool has_guest_content_script_;
+
   ScopedObserver<UserScriptSet, UserScriptSet::Observer>
       user_script_set_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(UserScriptInjector);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_USER_SCRIPT_INJECTOR_H_