Introduce ActiveScriptController; track active extension scripts

chrome/browser/extensions/location_bar_controller_provider.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_LOCATION_BAR_CONTROLLER_PROVIDER_H_
+#define CHROME_BROWSER_EXTENSIONS_LOCATION_BAR_CONTROLLER_PROVIDER_H_
+
+#include "chrome/browser/extensions/location_bar_controller.h"
+
+class ExtensionAction;
+
+namespace extensions {
+
+class Extension;
+
+class LocationBarControllerProvider {

[not at google - send to devlin, 2014/05/08 20:47:09]

the name of this class implies that it provides location bar controllers, which
is not right. LocationBarControllerDelegate?

[Devlin, 2014/05/08 23:01:00]

Not a delegate either.  Or a helper, filter, etc.  Offline decided
LocationBarController::ActionProvider.

+ public:
+  // Returns the action for the given extension, or NULL if there isn't one.
+  virtual ExtensionAction* GetActionForExtension(
+      const Extension* extension) = 0;
+
+  // Handles a click on an extension action.
+  virtual LocationBarController::Action OnClicked(
+      const Extension* extension) = 0;
+
+  // A notification that the WebContents has navigated in the main frame (and
+  // not in page), so any state relating to the current page should likely be
+  // reset.
+  virtual void OnNavigated() = 0;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_LOCATION_BAR_CONTROLLER_PROVIDER_H_