Zoom Extension API (chrome)

chrome/browser/ui/zoom/zoom_event_manager.h

Index: chrome/browser/ui/zoom/zoom_event_manager.h
diff --git a/chrome/browser/ui/zoom/zoom_event_manager.h b/chrome/browser/ui/zoom/zoom_event_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..09bfe23c8cf5b59127e03a655f8f0f8d05e791fd
--- /dev/null
+++ b/chrome/browser/ui/zoom/zoom_event_manager.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.

[wjmaclean, 2014/06/18 19:03:55]

Removed (c) here as well.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_ZOOM_ZOOM_EVENT_MANAGER_H_
+#define CHROME_BROWSER_UI_ZOOM_ZOOM_EVENT_MANAGER_H_
+
+#include "base/callback_list.h"
+#include "base/supports_user_data.h"
+#include "content/public/browser/host_zoom_map.h"
+
+namespace content {
+class BrowserContext;
+}  // namespace content
+
+class ZoomEventManager : public base::SupportsUserData::Data {
+ public:
+  static ZoomEventManager* GetForBrowserContext(
+      content::BrowserContext* context);
+
+  ZoomEventManager();
+  virtual ~ZoomEventManager();
+
+  void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change);

[Devlin, 2014/06/16 19:04:50]

comment.

[wjmaclean, 2014/06/18 19:03:55]

Done.

+  scoped_ptr<content::HostZoomMap::Subscription> AddZoomLevelChangedCallback(
+      const content::HostZoomMap::ZoomLevelChangedCallback& callback);
+
+ private:
+  base::CallbackList<void(const content::HostZoomMap::ZoomLevelChange&)>
+      zoom_level_changed_callbacks_;
+};
+#endif  // CHROME_BROWSER_UI_ZOOM_ZOOM_EVENT_MANAGER_H_