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

extensions/browser/extension_system.h

Index: extensions/browser/extension_system.h
diff --git a/extensions/browser/extension_system.h b/extensions/browser/extension_system.h
index baa8b5d998582e4a5008365f27e2cea890380b4a..d2c337914b2c1fe20dbfaf4b69b0d5a560b2994f 100644
--- a/extensions/browser/extension_system.h
+++ b/extensions/browser/extension_system.h
@@ -27,6 +27,7 @@ namespace extensions {
 
 class Blacklist;
 class ContentVerifier;
+class DeclarativeUserScriptMaster;
 class ErrorConsole;
 class EventRouter;
 class Extension;
@@ -135,6 +136,11 @@ class ExtensionSystem : public KeyedService {
   // 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