Clean up VMState a little bit.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index bad052c55e1e9e283d969684614cf65d976291d1..733dbdb033d42069c43c15c15ba607eb44bc0978 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -1984,8 +1984,10 @@ void MacroAssembler::CallApiFunctionAndReturn(Address function_address,
   if (FLAG_log_timer_events) {
     FrameScope frame(this, StackFrame::MANUAL);
     PushSafepointRegisters();
-    PrepareCallCFunction(0, eax);
-    CallCFunction(ExternalReference::log_enter_external_function(isolate()), 0);
+    PrepareCallCFunction(1, eax);
+    mov(Operand(esp, 0),
+        Immediate(ExternalReference::isolate_address(isolate())));
+    CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1);
     PopSafepointRegisters();
   }
 
@@ -1995,8 +1997,10 @@ void MacroAssembler::CallApiFunctionAndReturn(Address function_address,
   if (FLAG_log_timer_events) {
     FrameScope frame(this, StackFrame::MANUAL);
     PushSafepointRegisters();
-    PrepareCallCFunction(0, eax);
-    CallCFunction(ExternalReference::log_leave_external_function(isolate()), 0);
+    PrepareCallCFunction(1, eax);
+    mov(Operand(esp, 0),
+        Immediate(ExternalReference::isolate_address(isolate())));
+    CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1);
     PopSafepointRegisters();
   }