mac: Suppress partial availability warnings in theme helper.

base/mac/sdk_forward_declarations.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.
 
 // This file contains forward declarations for items in later SDKs than the
 // default one with which Chromium is built (currently 10.6).
 // If you call any function from this header, be sure to check at runtime for
 // respondsToSelector: before calling these functions (else your code will crash
 // on older OS X versions that chrome still supports).
 
@@ skipping 226 matching lines @@
 extern "C" {
 #if !defined(MAC_OS_X_VERSION_10_7) || \
     MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_7
 BASE_EXPORT extern NSString* const NSWindowWillEnterFullScreenNotification;
 BASE_EXPORT extern NSString* const NSWindowWillExitFullScreenNotification;
 BASE_EXPORT extern NSString* const NSWindowDidEnterFullScreenNotification;
 BASE_EXPORT extern NSString* const NSWindowDidExitFullScreenNotification;
 BASE_EXPORT extern NSString* const
     NSWindowDidChangeBackingPropertiesNotification;
 BASE_EXPORT extern NSString* const CBAdvertisementDataServiceDataKey;
+BASE_EXPORT extern NSString* const
+    NSPreferredScrollerStyleDidChangeNotification;
 #endif  // MAC_OS_X_VERSION_10_7
 
 #if !defined(MAC_OS_X_VERSION_10_9) || \
     MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_9
 BASE_EXPORT extern NSString* const NSWindowDidChangeOcclusionStateNotification;
 BASE_EXPORT extern NSString* const CBAdvertisementDataIsConnectable;
 #endif  // MAC_OS_X_VERSION_10_9
 
 #if !defined(MAC_OS_X_VERSION_10_10) || \
     MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
@@ skipping 269 matching lines @@
 // The symbol for kCWSSIDDidChangeNotification is available in the
 // CoreWLAN.framework for OSX versions 10.6 through 10.10. The symbol is not
 // declared in the OSX 10.9+ SDK, so when compiling against an OSX 10.9+ SDK,
 // declare the symbol.
 // ----------------------------------------------------------------------------
 #if defined(MAC_OS_X_VERSION_10_9) && \
     MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_9
 BASE_EXPORT extern "C" NSString* const kCWSSIDDidChangeNotification;
 #endif
 #endif  // BASE_MAC_SDK_FORWARD_DECLARATIONS_H_