Reland: Allow high-res bitmaps to be passed in from notifications API.

chrome/common/extensions/api/notifications/notification_style.h

Index: chrome/common/extensions/api/notifications/notification_style.h
diff --git a/chrome/common/extensions/api/notifications/notification_style.h b/chrome/common/extensions/api/notifications/notification_style.h
new file mode 100644
index 0000000000000000000000000000000000000000..ef4eb191b727015d1be90d94cda0a431267290d0
--- /dev/null
+++ b/chrome/common/extensions/api/notifications/notification_style.h
@@ -0,0 +1,20 @@
+// 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_COMMON_EXTENSIONS_API_NOTIFICATIONS_NOTIFICATION_STYLE_H_
+#define CHROME_COMMON_EXTENSIONS_API_NOTIFICATIONS_NOTIFICATION_STYLE_H_
+
+#include "ui/gfx/size.h"
+
+// This structure describes the size in DIPs of each type of image rendered
+// by the notification center within a notification.
+struct NotificationBitmapSizes {
+  gfx::Size image_size;
+  gfx::Size icon_size;
+  gfx::Size button_icon_size;
+};
+
+NotificationBitmapSizes GetNotificationBitmapSizes();
+
+#endif  // CHROME_COMMON_EXTENSIONS_API_NOTIFICATIONS_NOTIFICATION_STYLE_H_