Fixes for the profiler on arm64.

runtime/vm/thread_interrupter_win.cc

Index: runtime/vm/thread_interrupter_win.cc
===================================================================
--- runtime/vm/thread_interrupter_win.cc	(revision 40496)
+++ runtime/vm/thread_interrupter_win.cc	(working copy)
@@ -35,11 +35,13 @@
 #if defined(TARGET_ARCH_IA32)
       state->pc = static_cast<uintptr_t>(context.Eip);
       state->fp = static_cast<uintptr_t>(context.Ebp);
-      state->sp = static_cast<uintptr_t>(context.Esp);
+      state->csp = static_cast<uintptr_t>(context.Esp);
+      state->dsp = static_cast<uintptr_t>(context.Esp);
 #elif defined(TARGET_ARCH_X64)
       state->pc = static_cast<uintptr_t>(context.Rip);
       state->fp = static_cast<uintptr_t>(context.Rbp);
-      state->sp = static_cast<uintptr_t>(context.Rsp);
+      state->csp = static_cast<uintptr_t>(context.Rsp);
+      state->dsp = static_cast<uintptr_t>(context.Rsp);
 #else
       UNIMPLEMENTED();
 #endif
@@ -108,7 +110,6 @@
   // Nothing to do on Windows.
 }
 
-
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)