Moved some message center constants to message_center_constants.h.

ui/message_center/message_center_constants.h

 // Copyright (c) 2012 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 UI_MESSAGE_CENTER_MESSAGE_CENTER_CONSTANTS_H_
 #define UI_MESSAGE_CENTER_MESSAGE_CENTER_CONSTANTS_H_
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/message_center/message_center_export.h"
 
 namespace message_center {
 
 // Exported values /////////////////////////////////////////////////////////////
 
 // Square image sizes in pixels.
 MESSAGE_CENTER_EXPORT extern const int kNotificationButtonIconSize;
 MESSAGE_CENTER_EXPORT extern const int kNotificationIconSize;
 MESSAGE_CENTER_EXPORT extern const int kNotificationPreferredImageSize;
 MESSAGE_CENTER_EXPORT extern const int kSettingsIconSize;
 
+// Limits.
+MESSAGE_CENTER_EXPORT extern const size_t kMaxVisiblePopupNotifications;
+MESSAGE_CENTER_EXPORT extern const size_t kMaxVisibleMessageCenterNotifications;
+
 // Within a notification ///////////////////////////////////////////////////////
 
 // Pixel dimensions (H = horizontal, V = vertical).
 extern const int kControlButtonSize;  // Square size of close & expand buttons.
 extern const int kNotificationWidth;  // H size of the whole card.
 extern const int kIconToTextPadding;  // H space between icon & title/message.
 extern const int kTextTopPadding;     // V space between text elements.
 
 // Text sizes.
 extern const int kTitleFontSize;    // For title only.
@@ skipping 20 matching lines @@
 extern const int kMarginBetweenItems; // H & V space around & between
                                       // notifications.
 
 // Colors.
 extern const SkColor kBackgroundLightColor;  // Behind notifications, gradient
 extern const SkColor kBackgroundDarkColor;   // from light to dark.
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_MESSAGE_CENTER_CONSTANTS_H_