Fix wifi_component build with 10.9+ SDK

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 255 matching lines @@
 
 @property (readonly, copy) NSString* activityType;
 @property (copy) NSURL* webPageURL;
 
 @end
 
 BASE_EXPORT extern "C" NSString* const NSUserActivityTypeBrowsingWeb;
 
 #endif  // MAC_OS_X_VERSION_10_10
 
+// 10.6 SDK don't have CWSecurity while 10.9 SDK don't have CWSecurityMode, to
+// build with SDKs from 10.6 to 10.9 we need to forward declare both and do

[mef, 2014/09/04 15:31:34]

nit: I don't think we use 'we' in comments. :)

[Jiang Jiang, 2014/09/04 16:04:21]

Done.

+// runtime checks to ensure we use correct methods on different OS X versions.
+#if !defined(MAC_OS_X_VERSION_10_9) || \
+    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_9
+
+enum {
+   kCWSecurityNone = 0,
+   kCWSecurityWEP = 1,
+   kCWSecurityWPAPersonal = 2,
+   kCWSecurityWPAPersonalMixed = 3,
+   kCWSecurityWPA2Personal = 4,
+   kCWSecurityPersonal = 5,
+   kCWSecurityDynamicWEP = 6,
+   kCWSecurityWPAEnterprise = 7,
+   kCWSecurityWPAEnterpriseMixed = 8,
+   kCWSecurityWPA2Enterprise = 9,
+   kCWSecurityEnterprise = 10,
+   kCWSecurityUnknown = NSIntegerMax,
+};
+
+typedef NSInteger CWSecurity;
+
+@interface CWNetwork (ForwardDeclarations)
+@property(readonly) NSInteger rssiValue;
+- (BOOL)supportsSecurity:(CWSecurity)security;
+@end
+
+#else
+
+typedef enum {
+   kCWSecurityModeOpen = 0,
+   kCWSecurityModeWEP,
+   kCWSecurityModeWPA_PSK,
+   kCWSecurityModeWPA2_PSK,
+   kCWSecurityModeWPA_Enterprise,
+   kCWSecurityModeWPA2_Enterprise,
+   kCWSecurityModeWPS,
+   kCWSecurityModeDynamicWEP
+} CWSecurityMode;
+
+@interface CWNetwork (ForwardDeclarations)
+@property(readonly) NSNumber* rssi;
+@property(readonly) NSNumber* securityMode;
+@end
+
+#endif  // MAC_OS_X_VERSION_10_9
+
 #endif  // BASE_MAC_SDK_FORWARD_DECLARATIONS_H_