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"
+#include "content/public/browser/web_contents_observer.h"
+
+namespace content {
+class BrowserContext;
+class WebContents;
+}
+
+class ExtensionAction;
+
+namespace extensions {
+
+class Extension;
+class ExtensionRegistry;
+
+class LocationBarControllerProvider : public content::WebContentsObserver {

[not at google - send to devlin, 2014/05/07 22:49:02]

This looks a lot like what LocationBarController was. It seems ok to move the
utility-like functions into there.

[Devlin, 2014/05/08 18:15:46]

Done.

+ public:
+  explicit LocationBarControllerProvider(content::WebContents* web_contents);
+  virtual ~LocationBarControllerProvider();
+
+  // Returns the ExtensionActions for all extensions.
+  virtual std::vector<ExtensionAction*> GetCurrentActions() = 0;
+
+  // Handles a click on an extension action.
+  virtual LocationBarController::Action OnClicked(
+      const Extension* extension,
+      LocationBarController::MouseButton button) = 0;
+
+  // A notification that the WebContents has navigated (and thus, actions and
+  // state likely need to be refreshed). This is basically forwarded from
+  // WebContentsObserver::DidNavigateMainFrame().
+  virtual void NavigatedMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) = 0;
+
+ protected:
+  // Notifies that there has been a change, and actions need to be refreshed.
+  void NotifyChange();

[not at google - send to devlin, 2014/05/07 22:49:02]

it would be nice to make these protected: things as minimal as possible, if even
have them at all. i don't like looking up inheritance chains.

[Devlin, 2014/05/08 18:15:46]

Done.

+
+  // Returns the associated ExtensionRegistry.
+  ExtensionRegistry* GetExtensionRegistry();
+
+  content::WebContents* web_contents() { return web_contents_; }
+
+ private:
+  // content::WebContentsObserver implementation.
+  virtual void DidNavigateMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
+
+  // The associated web contents.
+  content::WebContents* web_contents_;
+
+  DISALLOW_COPY_AND_ASSIGN(LocationBarControllerProvider);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_LOCATION_BAR_CONTROLLER_PROVIDER_H_