Declarative content scripts: Browser-side: per-extension shared memory regions (lazily loaded)

extensions/browser/extension_system.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_BROWSER_EXTENSION_SYSTEM_H_
 #define EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "extensions/common/extension.h"
 
 class ExtensionService;
 
 #if defined(OS_CHROMEOS)
 namespace chromeos {
 class DeviceLocalAccountManagementPolicyProvider;
 }
 #endif  // defined(OS_CHROMEOS)
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 class Blacklist;
 class ContentVerifier;
+class DeclarativeUserScriptMaster;
 class ErrorConsole;
 class EventRouter;
 class Extension;
 class ExtensionSet;
 class ExtensionWarningService;
 class InfoMap;
 class InstallVerifier;
 class LazyBackgroundTaskQueue;
 class ManagementPolicy;
 class OneShotEvent;
@@ skipping 88 matching lines @@
   virtual const OneShotEvent& ready() const = 0;
 
   // Returns the content verifier, if any.
   virtual ContentVerifier* content_verifier() = 0;
 
   // Get a set of extensions that depend on the given extension.
   // TODO(elijahtaylor): Move SharedModuleService out of chrome/browser
   // so it can be retrieved from ExtensionSystem directly.
   virtual scoped_ptr<ExtensionSet> GetDependentExtensions(
       const Extension* extension) = 0;
+
+  // Get the user script master for declarative scripts, if any.
+  virtual DeclarativeUserScriptMaster*
+      GetDeclarativeUserScriptMasterByExtension(
+          const ExtensionId& extension_id) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_