Convert plain C-style casts to use CFCastStrict and GetValueFromDictionary template

net/proxy/proxy_server_mac.cc

Index: net/proxy/proxy_server_mac.cc
diff --git a/net/proxy/proxy_server_mac.cc b/net/proxy/proxy_server_mac.cc
index 4df37a47b0b1a1b43e10056c1a78b58585fa6781..d60a07a06e3b49b3718c882224057dc8421aa1c8 100644
--- a/net/proxy/proxy_server_mac.cc
+++ b/net/proxy/proxy_server_mac.cc
@@ -25,8 +25,9 @@ ProxyServer ProxyServer::FromDictionary(Scheme scheme,
   }
 
   CFStringRef host_ref =
-      (CFStringRef)base::mac::GetValueFromDictionary(dict, host_key,
-                                                    CFStringGetTypeID());
+      base::mac::CFCastStrict<CFStringRef>(
+          base::mac::GetValueFromDictionary(dict, host_key,
+                                            CFStringGetTypeID()));
   if (!host_ref) {
     LOG(WARNING) << "Could not find expected key "
                  << base::SysCFStringRefToUTF8(host_key)
@@ -36,8 +37,9 @@ ProxyServer ProxyServer::FromDictionary(Scheme scheme,
   std::string host = base::SysCFStringRefToUTF8(host_ref);
 
   CFNumberRef port_ref =
-      (CFNumberRef)base::mac::GetValueFromDictionary(dict, port_key,
-                                                    CFNumberGetTypeID());
+      base::mac::CFCastStrict<CFNumberRef>(
+          base::mac::GetValueFromDictionary(dict, port_key,
+                                            CFNumberGetTypeID()));
   int port;
   if (port_ref) {
     CFNumberGetValue(port_ref, kCFNumberIntType, &port);