Disentangle assembler from isolate.

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index ab994a32e49b3b4f342d8d40a197f662d44a856b..af1a0cfc56b0e390c429df31a5e375a2d9604874 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -2507,7 +2507,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleDeoptimizerCall(
   Address deopt_entry = Deoptimizer::GetDeoptimizationEntry(
       isolate(), deoptimization_id, bailout_type);
   if (deopt_entry == nullptr) return kTooManyDeoptimizationBailouts;
-  __ RecordDeoptReason(deoptimization_reason, pos, deoptimization_id);
+  if (isolate()->NeedsSourcePositionsForProfiling()) {
+    __ RecordDeoptReason(deoptimization_reason, pos, deoptimization_id);
+  }
   __ call(deopt_entry, RelocInfo::RUNTIME_ENTRY);
   return kSuccess;
 }