Allow esi to be an allocatable register on IA32.

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
diff --git a/src/ia32/lithium-codegen-ia32.h b/src/ia32/lithium-codegen-ia32.h
index 3782208336d6b17791993e8776c5eed8cc05a5e8..3ac3a41628ea04a1703cf9ab6ab3fd0315748139 100644
--- a/src/ia32/lithium-codegen-ia32.h
+++ b/src/ia32/lithium-codegen-ia32.h
@@ -149,17 +149,14 @@ class LCodeGen BASE_EMBEDDED {
   bool GenerateDeferredCode();
   bool GenerateSafepointTable();
 
-  void CallCode(Handle<Code> code,
-                RelocInfo::Mode mode,
-                LInstruction* instr);
-  void CallRuntime(Runtime::Function* function,
-                   int num_arguments,
-                   LInstruction* instr);
-  void CallRuntime(Runtime::FunctionId id,
-                   int num_arguments,
-                   LInstruction* instr) {
+  void CallCode(Handle<Code> code, RelocInfo::Mode mode, LInstruction* instr,
+                bool adjusted = true);
+  void CallRuntime(Runtime::Function* fun, int argc, LInstruction* instr,
+                   bool adjusted = true);
+  void CallRuntime(Runtime::FunctionId id, int argc, LInstruction* instr,
+                   bool adjusted = true) {
     Runtime::Function* function = Runtime::FunctionForId(id);
-    CallRuntime(function, num_arguments, instr);
+    CallRuntime(function, argc, instr, adjusted);
   }
 
   // Generate a direct call to a known function.  Expects the function