Mac: Remove some remaining 10.6 logic for absent overlay scrollbar APIs

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 243 matching lines @@
 #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 CBAdvertisementDataServiceUUIDsKey;
-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 CBAdvertisementDataOverflowServiceUUIDsKey;
 BASE_EXPORT extern NSString* const CBAdvertisementDataIsConnectable;
 #endif  // MAC_OS_X_VERSION_10_9
 
 #if !defined(MAC_OS_X_VERSION_10_10) || \
@@ skipping 77 matching lines @@
 @end
 
 @interface NSObject (ICCameraDeviceDelegateLionSDK)
 - (void)deviceDidBecomeReadyWithCompleteContentCatalog:(ICDevice*)device;
 - (void)didDownloadFile:(ICCameraFile*)file
                   error:(NSError*)error
                 options:(NSDictionary*)options
             contextInfo:(void*)contextInfo;
 @end
 
-@interface NSScroller (LionSDK)
-+ (NSInteger)preferredScrollerStyle;
-@end
-
 @interface CWInterface (LionSDK)
 - (BOOL)associateToNetwork:(CWNetwork*)network
                   password:(NSString*)password
                      error:(NSError**)error;
 - (NSSet*)scanForNetworksWithName:(NSString*)networkName error:(NSError**)error;
 @end
 
 @interface CWChannel (LionSDK)
 @property(readonly) CWChannelBand channelBand;
 @end
@@ skipping 186 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_