Include CoreBluetooth.h from files that need it.

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 10.10).
 // 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).
 
 #ifndef BASE_MAC_SDK_FORWARD_DECLARATIONS_H_
 #define BASE_MAC_SDK_FORWARD_DECLARATIONS_H_
 
 #import <AppKit/AppKit.h>
+#import <CoreBluetooth/CoreBluetooth.h>
 #import <CoreWLAN/CoreWLAN.h>
 #import <ImageCaptureCore/ImageCaptureCore.h>
 #import <IOBluetooth/IOBluetooth.h>
 #include <stdint.h>
 
 #include "base/base_export.h"
 
 // ----------------------------------------------------------------------------
 // Define typedefs, enums, and protocols not available in the version of the
 // OSX SDK being compiled against.
@@ 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.
 // ----------------------------------------------------------------------------
 BASE_EXPORT extern "C" NSString* const kCWSSIDDidChangeNotification;
 
 #endif  // BASE_MAC_SDK_FORWARD_DECLARATIONS_H_