Disentangle assembler from isolate.

src/wasm/wasm-debug.cc

Index: src/wasm/wasm-debug.cc
diff --git a/src/wasm/wasm-debug.cc b/src/wasm/wasm-debug.cc
index 0327c1f1414166e6946096f5a19b4eb84b04f808..79a1b7e92cd75c7677b1c737539d63082b68228f 100644
--- a/src/wasm/wasm-debug.cc
+++ b/src/wasm/wasm-debug.cc
@@ -386,7 +386,8 @@ void RedirectCallsitesInCode(Code* code, Code* old_target, Code* new_target) {
     DCHECK(RelocInfo::IsCodeTarget(it.rinfo()->rmode()));
     Code* target = Code::GetCodeFromTargetAddress(it.rinfo()->target_address());
     if (target != old_target) continue;
-    it.rinfo()->set_target_address(new_target->instruction_start());
+    it.rinfo()->set_target_address(code->GetIsolate(),
+                                   new_target->instruction_start());
   }
 }