Last cleanup int -> intptr_t. Also removed a hack.

runtime/vm/simulator_arm.cc

Index: runtime/vm/simulator_arm.cc
===================================================================
--- runtime/vm/simulator_arm.cc	(revision 28370)
+++ runtime/vm/simulator_arm.cc	(working copy)
@@ -1016,7 +1016,7 @@
 }
 
 
-int Simulator::ReadW(uword addr, Instr* instr) {
+intptr_t Simulator::ReadW(uword addr, Instr* instr) {
   static StatsCounter counter_read_w("Simulated word reads");
   counter_read_w.Increment();
   if ((addr & 3) == 0) {
@@ -1028,7 +1028,7 @@
 }
 
 
-void Simulator::WriteW(uword addr, int value, Instr* instr) {
+void Simulator::WriteW(uword addr, intptr_t value, Instr* instr) {
   static StatsCounter counter_write_w("Simulated word writes");
   counter_write_w.Increment();
   if ((addr & 3) == 0) {
@@ -1109,7 +1109,7 @@
 }
 
 
-int Simulator::ReadExclusiveW(uword addr, Instr* instr) {
+intptr_t Simulator::ReadExclusiveW(uword addr, Instr* instr) {
   // This lock is initialized in Simulator::InitOnce().
   MutexLocker ml(exclusive_access_lock_);
   SetExclusiveAccess(addr);
@@ -1117,7 +1117,7 @@
 }
 
 
-int Simulator::WriteExclusiveW(uword addr, int value, Instr* instr) {
+intptr_t Simulator::WriteExclusiveW(uword addr, intptr_t value, Instr* instr) {
   // This lock is initialized in Simulator::InitOnce().
   MutexLocker ml(exclusive_access_lock_);
   bool write_allowed = HasExclusiveAccessAndOpen(addr);