Revert of Remove all reference to carbon api

webrtc/base/proxydetect.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1152 matching lines @@
 
   if (proxyDict != NULL) {
     // sending it off to another function makes it easier to unit test
     // since we can make our own dictionary to hand to that function.
     result = GetMacProxySettingsFromDictionary(proxy, proxyDict);
 
     if (result) {
       result = p_putPasswordInProxyInfo(proxy);
     }
 
+    // We created the dictionary with something that had the
+    // word 'copy' in it, so we have to release it, according
+    // to the Carbon memory management standards.
     CFRelease(proxyDict);
   } else {
     LOG(LS_ERROR) << "SCDynamicStoreCopyProxies failed";
   }
 
   return result;
 }
 #endif  // WEBRTC_MAC && !defined(WEBRTC_IOS)
 
 #ifdef WEBRTC_IOS
@@ skipping 30 matching lines @@
       // Finally, try HTTP proxy. Note that flute doesn't
       // differentiate between HTTPS and HTTP, hence we are using the
       // same flute type here, ie. PROXY_HTTPS.
       proxy->type = PROXY_HTTPS;
 
       proxy->address.SetIP(hostname);
       proxy->address.SetPort(port);
       result = true;
   }
 
+  // We created the dictionary with something that had the
+  // word 'copy' in it, so we have to release it, according
+  // to the Carbon memory management standards.
   CFRelease(proxy_dict);
 
   return result;
 }
 #endif // WEBRTC_IOS
 
 bool AutoDetectProxySettings(const char* agent, const char* url,
                              ProxyInfo* proxy) {
 #if defined(WEBRTC_WIN)
   return WinHttpAutoDetectProxyForUrl(agent, url, proxy);
@@ skipping 53 matching lines @@
     if (!result) {
       // Either auto detection is not supported or we simply didn't
       // find any proxy, reset type.
       proxy->type = rtc::PROXY_NONE;
     }
   }
   return result;
 }
 
 }  // namespace rtc