Reland "Pass a Code object to Assembler::(set_)target_address_at for use by ool constant pool."

src/a64/frames-a64.h

Index: src/a64/frames-a64.h
diff --git a/src/a64/frames-a64.h b/src/a64/frames-a64.h
index 5ef768164579091ec1f36e974d4169a58c514932..d2bbda69dcb786539bf1313443b0799cd054097f 100644
--- a/src/a64/frames-a64.h
+++ b/src/a64/frames-a64.h
@@ -69,6 +69,8 @@ class ExitFrameConstants : public AllStatic {
   static const int kSPOffset             = -1 * kPointerSize;
   static const int kCodeOffset           = -2 * kPointerSize;
   static const int kLastExitFrameField   = kCodeOffset;
+
+  static const int kConstantPoolOffset   = 0;  // Not used
 };