Drop IsPregenerated() and allow_stub_calls flag.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index 294113027fa3d63efa5dedda8e7ab3377d85a64a..29de68efdd1c9b8b77303eda10c5930efbfb48eb 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -905,8 +905,6 @@ class MacroAssembler: public Assembler {
   // Verify restrictions about code generated in stubs.
   void set_generating_stub(bool value) { generating_stub_ = value; }
   bool generating_stub() { return generating_stub_; }
-  void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
-  bool allow_stub_calls() { return allow_stub_calls_; }
   void set_has_frame(bool value) { has_frame_ = value; }
   bool has_frame() { return has_frame_; }
   inline bool AllowThisStubCall(CodeStub* stub);
@@ -992,7 +990,6 @@ class MacroAssembler: public Assembler {
 
  private:
   bool generating_stub_;
-  bool allow_stub_calls_;
   bool has_frame_;
   // This handle will be patched with the code object on installation.
   Handle<Object> code_object_;