json_schema_compiler: Use std::vector<char> for binary values.

chromeos/dbus/shill_third_party_vpn_driver_client.cc

Index: chromeos/dbus/shill_third_party_vpn_driver_client.cc
diff --git a/chromeos/dbus/shill_third_party_vpn_driver_client.cc b/chromeos/dbus/shill_third_party_vpn_driver_client.cc
index c3392cd12851d9adae31cf1308b54381ea0427af..3237f501a80ffe08a1ad9ecb14931c3d983de128 100644
--- a/chromeos/dbus/shill_third_party_vpn_driver_client.cc
+++ b/chromeos/dbus/shill_third_party_vpn_driver_client.cc
@@ -4,9 +4,8 @@
 
 #include "chromeos/dbus/shill_third_party_vpn_driver_client.h"
 
-#include <string>
-
 #include "base/bind.h"
+#include "base/stl_util.h"
 #include "chromeos/dbus/shill_third_party_vpn_observer.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
@@ -56,7 +55,7 @@ class ShillThirdPartyVpnDriverClientImpl
 
   void SendPacket(
       const std::string& object_path_value,
-      const std::string& ip_packet,
+      const std::vector<char>& ip_packet,
       const base::Closure& callback,
       const ShillClientHelper::ErrorCallback& error_callback) override;
 
@@ -245,14 +244,17 @@ void ShillThirdPartyVpnDriverClientImpl::UpdateConnectionState(
 
 void ShillThirdPartyVpnDriverClientImpl::SendPacket(
     const std::string& object_path_value,
-    const std::string& ip_packet,
+    const std::vector<char>& ip_packet,
     const base::Closure& callback,
     const ShillClientHelper::ErrorCallback& error_callback) {
   dbus::MethodCall method_call(shill::kFlimflamThirdPartyVpnInterface,
                                shill::kSendPacketFunction);
   dbus::MessageWriter writer(&method_call);
-  writer.AppendArrayOfBytes(reinterpret_cast<const uint8_t*>(ip_packet.data()),
-                            ip_packet.size());
+  static_assert(sizeof(uint8_t) == sizeof(char),
+                "Can't reinterpret ip_packet if char is not 8 bit large.");
+  writer.AppendArrayOfBytes(
+      reinterpret_cast<const uint8_t*>(vector_as_array(&ip_packet)),
+      ip_packet.size());
   GetHelper(object_path_value)
       ->CallVoidMethodWithErrorCallback(&method_call, callback, error_callback);
 }
@@ -269,7 +271,7 @@ void ShillThirdPartyVpnDriverClientImpl::OnPacketReceived(
   size_t length = 0;
   if (reader.PopArrayOfBytes(&data, &length)) {
     helper_info->observer()->OnPacketReceived(
-        std::string(reinterpret_cast<const char*>(data), length));
+        std::vector<char>(data, data + length));
   }
 }