Remove all the OS X 10.6 SDK forward declarations.

net/base/test_root_certs_mac.cc

 // Copyright (c) 2010 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.
 
 #include "net/base/test_root_certs.h"
 
 #include <Security/Security.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "net/base/x509_certificate.h"
 
 namespace net {
 
 namespace {
 
-#if !defined(MAC_OS_X_VERSION_10_6) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
-// Declared in <Security/SecBase.h> of the 10.6 SDK.
-enum {
-  errSecUnimplemented = -4,
-};
-#endif
-
 typedef OSStatus (*SecTrustSetAnchorCertificatesOnlyFuncPtr)(SecTrustRef,
                                                              Boolean);
 
 Boolean OurSecCertificateEqual(const void* value1, const void* value2) {
   if (CFGetTypeID(value1) != SecCertificateGetTypeID() ||
       CFGetTypeID(value2) != SecCertificateGetTypeID())
     return CFEqual(value1, value2);
   return X509Certificate::IsSameOSCert(
       reinterpret_cast<SecCertificateRef>(const_cast<void*>(value1)),
       reinterpret_cast<SecCertificateRef>(const_cast<void*>(value2)));
@@ skipping 91 matching lines @@
 }
 
 TestRootCerts::~TestRootCerts() {}
 
 void TestRootCerts::Init() {
   temporary_roots_.reset(CFArrayCreateMutable(kCFAllocatorDefault, 0,
                                               &kCertArrayCallbacks));
 }
 
 }  // namespace net