Fix a braino in the stack layout.

Also do some refactoring to have this code be just in CodeGenerator.

Change-Id: I88de109889138af8d60027973c12a64bee813cb7
diff --git a/compiler/optimizing/code_generator_x86.h b/compiler/optimizing/code_generator_x86.h
index 2a45954..d622d2a 100644
--- a/compiler/optimizing/code_generator_x86.h
+++ b/compiler/optimizing/code_generator_x86.h
@@ -128,7 +128,6 @@
   explicit CodeGeneratorX86(HGraph* graph);
   virtual ~CodeGeneratorX86() { }
 
-  virtual void ComputeFrameSize(size_t number_of_spill_slots) OVERRIDE;
   virtual void GenerateFrameEntry() OVERRIDE;
   virtual void GenerateFrameExit() OVERRIDE;
   virtual void Bind(Label* label) OVERRIDE;
@@ -138,6 +137,8 @@
     return kX86WordSize;
   }
 
+  virtual size_t FrameEntrySpillSize() const OVERRIDE;
+
   virtual HGraphVisitor* GetLocationBuilder() OVERRIDE {
     return &location_builder_;
   }
@@ -155,9 +156,7 @@
   virtual ManagedRegister AllocateFreeRegister(
       Primitive::Type type, bool* blocked_registers) const OVERRIDE;
 
-  int32_t GetStackSlot(HLocal* local) const;
   virtual Location GetStackLocation(HLoadLocal* load) const OVERRIDE;
-  virtual Location GetTemporaryLocation(HTemporary* temp) const OVERRIDE;
 
   virtual size_t GetNumberOfCoreRegisters() const OVERRIDE {
     return kNumberOfCpuRegisters;