Revert of Update BookmarkBarController to use non-deprecated dragging 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 328 matching lines @@
 
 @interface NSAnimationContext (LionSDK)
 + (void)runAnimationGroup:(void (^)(NSAnimationContext* context))changes
         completionHandler:(void (^)(void))completionHandler;
 @property(copy) void (^completionHandler)(void);
 @end
 
 @interface NSView (LionSDK)
 - (NSSize)convertSizeFromBacking:(NSSize)size;
 - (void)setWantsBestResolutionOpenGLSurface:(BOOL)flag;
-- (NSDraggingSession*)beginDraggingSessionWithItems:(NSArray*)items
-                                              event:(NSEvent*)event
-                                             source:
-                                                 (id<NSDraggingSource>)source;
 @end
 
 @interface NSObject (ICCameraDeviceDelegateLionSDK)
 - (void)deviceDidBecomeReadyWithCompleteContentCatalog:(ICDevice*)device;
 - (void)didDownloadFile:(ICCameraFile*)file
                   error:(NSError*)error
                 options:(NSDictionary*)options
             contextInfo:(void*)contextInfo;
 @end
 
@@ skipping 196 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_