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

chrome/browser/extensions/extension_system_impl.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_
 
+#include "base/memory/scoped_vector.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/one_shot_event.h"
 
 class Profile;
 
 namespace extensions {
 
 class ContentVerifier;
+class DeclarativeUserScriptMaster;
 class ExtensionSystemSharedFactory;
 class ExtensionWarningBadgeService;
 class NavigationObserver;
+class SharedUserScriptMaster;
 class StandardManagementPolicyProvider;
 class StateStoreNotificationObserver;
 
 // The ExtensionSystem for ProfileImpl and OffTheRecordProfileImpl.
 // Implementation details: non-shared services are owned by
 // ExtensionSystemImpl, a KeyedService with separate incognito
 // instances. A private Shared class (also a KeyedService,
 // but with a shared instance for incognito) keeps the common services.
 class ExtensionSystemImpl : public ExtensionSystem {
  public:
   explicit ExtensionSystemImpl(Profile* profile);
   virtual ~ExtensionSystemImpl();
 
   // KeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
   virtual void InitForRegularProfile(bool extensions_enabled) OVERRIDE;
 
   virtual ExtensionService* extension_service() OVERRIDE;  // shared
   virtual RuntimeData* runtime_data() OVERRIDE;  // shared
   virtual ManagementPolicy* management_policy() OVERRIDE;  // shared
-  virtual UserScriptMaster* user_script_master() OVERRIDE;  // shared
+  // shared
+  virtual SharedUserScriptMaster* shared_user_script_master() OVERRIDE;
   virtual ProcessManager* process_manager() OVERRIDE;
   virtual StateStore* state_store() OVERRIDE;  // shared
   virtual StateStore* rules_store() OVERRIDE;  // shared
   virtual LazyBackgroundTaskQueue* lazy_background_task_queue()
       OVERRIDE;  // shared
   virtual InfoMap* info_map() OVERRIDE; // shared
   virtual EventRouter* event_router() OVERRIDE;  // shared
   virtual ExtensionWarningService* warning_service() OVERRIDE;
   virtual Blacklist* blacklist() OVERRIDE;  // shared
   virtual ErrorConsole* error_console() OVERRIDE;
   virtual InstallVerifier* install_verifier() OVERRIDE;
   virtual QuotaService* quota_service() OVERRIDE;  // shared
 
   virtual void RegisterExtensionWithRequestContexts(
       const Extension* extension) OVERRIDE;
 
   virtual void UnregisterExtensionWithRequestContexts(
       const std::string& extension_id,
       const UnloadedExtensionInfo::Reason reason) OVERRIDE;
 
   virtual const OneShotEvent& ready() const OVERRIDE;
   virtual ContentVerifier* content_verifier() OVERRIDE;  // shared
   virtual scoped_ptr<ExtensionSet> GetDependentExtensions(
       const Extension* extension) OVERRIDE;
 
+  virtual DeclarativeUserScriptMaster*
+      GetDeclarativeUserScriptMasterByExtension(
+          const ExtensionId& extension_id) OVERRIDE;  // shared
+
  private:
   friend class ExtensionSystemSharedFactory;
 
   // Owns the Extension-related systems that have a single instance
   // shared between normal and incognito profiles.
   class Shared : public KeyedService {
    public:
     explicit Shared(Profile* profile);
     virtual ~Shared();
 
     // Initialization takes place in phases.
     virtual void InitPrefs();
     // This must not be called until all the providers have been created.
     void RegisterManagementPolicyProviders();
     void Init(bool extensions_enabled);
 
     // KeyedService implementation.
     virtual void Shutdown() OVERRIDE;
 
     StateStore* state_store();
     StateStore* rules_store();
     ExtensionService* extension_service();
     RuntimeData* runtime_data();
     ManagementPolicy* management_policy();
-    UserScriptMaster* user_script_master();
+    SharedUserScriptMaster* shared_user_script_master();
     Blacklist* blacklist();
     InfoMap* info_map();
     LazyBackgroundTaskQueue* lazy_background_task_queue();
     EventRouter* event_router();
     ExtensionWarningService* warning_service();
     ErrorConsole* error_console();
     InstallVerifier* install_verifier();
     QuotaService* quota_service();
     const OneShotEvent& ready() const { return ready_; }
     ContentVerifier* content_verifier();
 
+    DeclarativeUserScriptMaster* GetDeclarativeUserScriptMasterByExtension(
+        const ExtensionId& extension_id);
+
    private:
     Profile* profile_;
 
     // The services that are shared between normal and incognito profiles.
 
     scoped_ptr<StateStore> state_store_;
     scoped_ptr<StateStoreNotificationObserver>
         state_store_notification_observer_;
     scoped_ptr<StateStore> rules_store_;
     // LazyBackgroundTaskQueue is a dependency of
     // MessageService and EventRouter.
     scoped_ptr<LazyBackgroundTaskQueue> lazy_background_task_queue_;
     scoped_ptr<EventRouter> event_router_;
     scoped_ptr<NavigationObserver> navigation_observer_;
-    scoped_ptr<UserScriptMaster> user_script_master_;
+    // Shared memory region manager for scripts statically declared in extension
+    // manifests. This region is shared between all extensions.
+    scoped_ptr<SharedUserScriptMaster> shared_user_script_master_;
+    // Shared memory region manager for programmatically declared scripts, one
+    // per extension. Managers are instantiated the first time the declarative
+    // API is used by an extension to request content scripts.
+    ScopedVector<DeclarativeUserScriptMaster> declarative_user_script_masters_;
     scoped_ptr<Blacklist> blacklist_;
     // StandardManagementPolicyProvider depends on Blacklist.
     scoped_ptr<StandardManagementPolicyProvider>
         standard_management_policy_provider_;
     scoped_ptr<RuntimeData> runtime_data_;
     // ExtensionService depends on StateStore, Blacklist and RuntimeData.
     scoped_ptr<ExtensionService> extension_service_;
     scoped_ptr<ManagementPolicy> management_policy_;
     // extension_info_map_ needs to outlive process_manager_.
     scoped_refptr<InfoMap> extension_info_map_;
@@ skipping 23 matching lines @@
   // extension processes and those require access to the ResourceContext owned
   // by |io_data_|.
   scoped_ptr<ProcessManager> process_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSystemImpl);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_