Get rid of some downcasts

runtime/bin/socket.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/io_buffer.h"
 #include "bin/socket.h"
 #include "bin/dartutils.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
 
@@ skipping 168 matching lines @@
 
 void FUNCTION_NAME(Socket_WriteList)(Dart_NativeArguments args) {
   static bool short_socket_writes = Dart_IsVMFlagSet("short_socket_write");
   Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
   intptr_t socket = 0;
   Dart_Handle err = Socket::GetSocketIdNativeField(socket_obj, &socket);
   if (Dart_IsError(err)) Dart_PropagateError(err);
   Dart_Handle buffer_obj = Dart_GetNativeArgument(args, 1);
   ASSERT(Dart_IsList(buffer_obj));
   intptr_t offset =
-      DartUtils::GetIntegerValue(Dart_GetNativeArgument(args, 2));
+      DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 2));
   intptr_t length =
-      DartUtils::GetIntegerValue(Dart_GetNativeArgument(args, 3));
+      DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 3));
   if (short_socket_writes) {
     length = (length + 1) / 2;
   }
   Dart_TypedData_Type type;
   uint8_t* buffer = NULL;
   intptr_t len;
   Dart_Handle result = Dart_TypedDataAcquireData(
       buffer_obj, &type, reinterpret_cast<void**>(&buffer), &len);
   if (Dart_IsError(result)) Dart_PropagateError(result);
   ASSERT((offset + length) <= len);
@@ skipping 67 matching lines @@
     Dart_SetReturnValue(args, Dart_NewInteger(type));
   } else {
     Dart_SetReturnValue(args, DartUtils::NewDartOSError());
   }
 }
 
 
 void FUNCTION_NAME(Socket_GetStdioHandle)(Dart_NativeArguments args) {
   Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
   intptr_t num =
-      DartUtils::GetIntegerValue(Dart_GetNativeArgument(args, 1));
+      DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 1));
   ASSERT(num == 0 || num == 1 || num == 2);
   intptr_t socket = Socket::GetStdioHandle(num);
   Dart_Handle err = Socket::SetSocketIdNativeField(socket_obj, socket);
   if (Dart_IsError(err)) Dart_PropagateError(err);
   Dart_SetReturnValue(args, Dart_NewBoolean(socket >= 0));
 }
 
 
 void FUNCTION_NAME(ServerSocket_CreateBindListen)(Dart_NativeArguments args) {
   Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
@@ skipping 270 matching lines @@
   return Dart_SetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 
 Dart_Handle Socket::GetSocketIdNativeField(Dart_Handle socket, intptr_t* id) {
   return Dart_GetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 }  // namespace bin
 }  // namespace dart