Progress towards making Zones independent of Isolates and Threads.

src/deoptimizer.h

Index: src/deoptimizer.h
diff --git a/src/deoptimizer.h b/src/deoptimizer.h
index 6bc4a5103627aeb4fb3e6b7358be0edc96e1330c..167e30d09905a644a15fb962264a379d5268ef83 100644
--- a/src/deoptimizer.h
+++ b/src/deoptimizer.h
@@ -515,10 +515,10 @@ class FrameDescription {
 
 class TranslationBuffer BASE_EMBEDDED {
  public:
-  TranslationBuffer() : contents_(256) { }
+  explicit TranslationBuffer(Zone* zone) : contents_(256, zone) { }
 
   int CurrentIndex() const { return contents_.length(); }
-  void Add(int32_t value);
+  void Add(int32_t value, Zone* zone);
 
   Handle<ByteArray> CreateByteArray();
 
@@ -569,12 +569,14 @@ class Translation BASE_EMBEDDED {
     DUPLICATE
   };
 
-  Translation(TranslationBuffer* buffer, int frame_count, int jsframe_count)
+  Translation(TranslationBuffer* buffer, int frame_count, int jsframe_count,
+              Zone* zone)
       : buffer_(buffer),
-        index_(buffer->CurrentIndex()) {
-    buffer_->Add(BEGIN);
-    buffer_->Add(frame_count);
-    buffer_->Add(jsframe_count);
+        index_(buffer->CurrentIndex()),
+        zone_(zone) {
+    buffer_->Add(BEGIN, zone);
+    buffer_->Add(frame_count, zone);
+    buffer_->Add(jsframe_count, zone);
   }
 
   int index() const { return index_; }
@@ -593,6 +595,8 @@ class Translation BASE_EMBEDDED {
   void StoreArgumentsObject();
   void MarkDuplicate();
 
+  Zone* zone() { return zone_; }
+
   static int NumberOfOperandsFor(Opcode opcode);
 
 #if defined(OBJECT_PRINT) || defined(ENABLE_DISASSEMBLER)
@@ -602,6 +606,8 @@ class Translation BASE_EMBEDDED {
  private:
   TranslationBuffer* buffer_;
   int index_;
+
+  Zone* zone_;
 };