app_shell: Extract extension runtime data from ExtensionService

extensions/browser/runtime_data.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_RUNTIME_DATA_H_
+#define EXTENSIONS_BROWSER_RUNTIME_DATA_H_
+
+#include <map>
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "extensions/browser/extension_registry_observer.h"
+
+namespace extensions {
+
+class Extension;
+class ExtensionRegistry;
+
+// Contains per-extension data that can change during the life of the process,
+// but does not persist across restarts. Shared between incognito and regular
+// browser contexts. Lives on the UI thread. Must be destroyed before
+// ExtensionRegistry.
+class RuntimeData : public ExtensionRegistryObserver {
+ public:
+  // Observes |registry| to clean itself up when extensions change state.
+  // |registry| must not be NULL.
+  explicit RuntimeData(ExtensionRegistry* registry);
+  virtual ~RuntimeData();
+
+  // Whether the persistent background page, if any, is ready. We don't load
+  // other components until then. If there is no background page, or if it is
+  // non-persistent (lazy), we consider it to be ready.
+  bool IsBackgroundPageReady(const Extension* extension) const;
+  void SetBackgroundPageReady(const Extension* extension, bool value);
+
+  // Getter and setter for the flag that specifies whether the extension is
+  // being upgraded.
+  bool IsBeingUpgraded(const Extension* extension) const;
+  void SetBeingUpgraded(const Extension* extension, bool value);
+
+  // Getter and setter for the flag that specifies if the extension has used
+  // the webrequest API.
+  // TODO(mpcomplete): remove. http://crbug.com/100411
+  bool HasUsedWebRequest(const Extension* extension) const;
+  void SetHasUsedWebRequest(const Extension* extension, bool value);
+
+  // Returns true if the extension is being tracked. Used only for testing.
+  bool HasExtensionForTesting(const Extension* extension) const;
+
+  // Erase runtime data for all extensions. Used only for testing. Cannot be
+  // named ClearAllForTesting due to false-positive presubmit errors.
+  void ClearAll();
+
+  // ExtensionRegistryObserver overrides. Public for testing.
+  virtual void OnExtensionUnloaded(const Extension* extension) OVERRIDE;
+
+ private:
+  // Bitmasks for runtime states.
+  enum RuntimeFlag {
+    // Set if the background page is ready.
+    BACKGROUND_PAGE_READY = 1 << 0,
+    // Set while the extension is being upgraded.
+    BEING_UPGRADED        = 1 << 1,
+    // Set if the extension has used the webRequest API.
+    HAS_USED_WEBREQUEST   = 1 << 2,
+  };
+
+  // Returns the setting for the flag or false if the extension isn't found.
+  bool HasFlag(const Extension* extension, RuntimeFlag flag) const;
+
+  // Sets |flag| for |extension| to |value|. Adds |extension| to the list of
+  // extensions if it isn't present.
+  void SetFlag(const Extension* extension, RuntimeFlag flag, bool value);
+
+  // Map from extension ID to the RuntimeFlags bits.
+  typedef std::map<std::string, int> ExtensionFlagsMap;
+  ExtensionFlagsMap extension_flags_;
+
+  ExtensionRegistry* registry_;  // Not owned.
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_RUNTIME_DATA_H_