Refactor FrameAndConstantPoolScope and ConstantPoolUnavailableScope to be architecture independent

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 503330340297e5b76877856ab7cf9b1528197c84..301afed0091b64bf6e9aea209b18b22ce643011d 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -3984,6 +3984,13 @@ void MacroAssembler::Prologue(bool code_pre_aging) {
 }
 
 
+void MacroAssembler::EnterFrame(StackFrame::Type type,
+                                bool load_constant_pool_pointer_reg) {
+  // Out-of-line constant pool not implemented on x64.
+  UNREACHABLE();
+}
+
+
 void MacroAssembler::EnterFrame(StackFrame::Type type) {
   pushq(rbp);
   movp(rbp, rsp);