Drop IsPregenerated() and allow_stub_calls flag.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index d223b57a5a509202add60f9d3ecf869c7561f7a6..f119a4299fe3a348292b34f2f0a9f3f63bdff14f 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -1191,8 +1191,6 @@ 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);
@@ -1471,7 +1469,6 @@ class MacroAssembler: public Assembler {
   MemOperand SafepointRegistersAndDoublesSlot(Register reg);
 
   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_;