- Fix a lot of warnings generated by -Wshorten-64-to-32

runtime/vm/os_win.cc

Index: runtime/vm/os_win.cc
===================================================================
--- runtime/vm/os_win.cc	(revision 38492)
+++ runtime/vm/os_win.cc	(working copy)
@@ -137,7 +137,7 @@
 }
 
 
-word OS::ActivationFrameAlignment() {
+intptr_t OS::ActivationFrameAlignment() {
 #ifdef _WIN64
   // Windows 64-bit ABI requires the stack to be 16-byte aligned.
   return 16;
@@ -148,20 +148,12 @@
 }
 
 
-word OS::PreferredCodeAlignment() {
+intptr_t OS::PreferredCodeAlignment() {
   ASSERT(32 <= OS::kMaxPreferredCodeAlignment);
   return 32;
 }
 
 
-uword OS::GetStackSizeLimit() {
-  // TODO(ager): Can you programatically determine the actual stack
-  // size limit on Windows? The 2MB limit is set at link time. Maybe
-  // that value should be propagated here?
-  return 2 * MB;
-}
-
-
 bool OS::AllowStackFrameIteratorFromAnotherThread() {
   return true;
 }