Progress towards making Zones independent of Isolates and Threads.

src/arm/lithium-codegen-arm.h

Index: src/arm/lithium-codegen-arm.h
diff --git a/src/arm/lithium-codegen-arm.h b/src/arm/lithium-codegen-arm.h
index c6a3af7e02bd123e9e8f4103b38f308e6f1b8e42..17fd09fa9eed1b4adbdfe3a085677cb97470d34d 100644
--- a/src/arm/lithium-codegen-arm.h
+++ b/src/arm/lithium-codegen-arm.h
@@ -43,7 +43,8 @@ class SafepointGenerator;
 
 class LCodeGen BASE_EMBEDDED {
  public:
-  LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info)
+  LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info,
+           Zone* zone)
       : chunk_(chunk),
         masm_(assembler),
         info_(info),
@@ -56,11 +57,14 @@ class LCodeGen BASE_EMBEDDED {
         inlined_function_count_(0),
         scope_(info->scope()),
         status_(UNUSED),
+        translations_(zone),
         deferred_(8),
         osr_pc_offset_(-1),
         last_lazy_deopt_pc_(0),
+        safepoints_(zone),
         resolver_(this),
-        expected_safepoint_kind_(Safepoint::kSimple) {
+        expected_safepoint_kind_(Safepoint::kSimple),
+        zone_(zone) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
@@ -71,6 +75,7 @@ class LCodeGen BASE_EMBEDDED {
   Isolate* isolate() const { return info_->isolate(); }
   Factory* factory() const { return isolate()->factory(); }
   Heap* heap() const { return isolate()->heap(); }
+  Zone* zone() const { return zone_; }
 
   // Support for converting LOperands to assembler types.
   // LOperand must be a register.
@@ -371,6 +376,8 @@ class LCodeGen BASE_EMBEDDED {
 
   Safepoint::Kind expected_safepoint_kind_;
 
+  Zone* zone_;
+
   class PushSafepointRegistersScope BASE_EMBEDDED {
    public:
     PushSafepointRegistersScope(LCodeGen* codegen,