Move Zone's destructor out of a header file.

runtime/vm/zone.cc

Index: runtime/vm/zone.cc
diff --git a/runtime/vm/zone.cc b/runtime/vm/zone.cc
index 743727a54f91a3abffc9b8b9efb41a1798ae8620..ac79f356b6c94d9eb50f8b688465736eceaf8252 100644
--- a/runtime/vm/zone.cc
+++ b/runtime/vm/zone.cc
@@ -72,6 +72,31 @@ Zone::Segment* Zone::Segment::New(intptr_t size, Zone::Segment* next) {
 }
 
 
+Zone::Zone()
+    : initial_buffer_(buffer_, kInitialChunkSize),
+      position_(initial_buffer_.start()),
+      limit_(initial_buffer_.end()),
+      head_(NULL),
+      large_segments_(NULL),
+      handles_(),
+      previous_(NULL) {
+  ASSERT(Utils::IsAligned(position_, kAlignment));
+#ifdef DEBUG
+  // Zap the entire initial buffer.
+  memset(initial_buffer_.pointer(), kZapUninitializedByte,
+         initial_buffer_.size());
+#endif
+}
+
+
+Zone::~Zone() {
+  if (FLAG_trace_zones) {
+    DumpZoneSizes();
+  }
+  DeleteAll();
+}
+
+
 void Zone::DeleteAll() {
   // Traverse the chained list of segments, zapping (in debug mode)
   // and freeing every zone segment.
@@ -234,4 +259,25 @@ char* Zone::VPrint(const char* format, va_list args) {
 }
 
 
+StackZone::StackZone(Thread* thread) : StackResource(thread), zone_() {
+  if (FLAG_trace_zones) {
+    OS::PrintErr("*** Starting a new Stack zone 0x%" Px "(0x%" Px ")\n",
+                 reinterpret_cast<intptr_t>(this),
+                 reinterpret_cast<intptr_t>(&zone_));
+  }
+  zone_.Link(thread->zone());
+  thread->set_zone(&zone_);
+}
+
+
+StackZone::~StackZone() {
+  ASSERT(thread()->zone() == &zone_);
+  thread()->set_zone(zone_.previous_);
+  if (FLAG_trace_zones) {
+    OS::PrintErr("*** Deleting Stack zone 0x%" Px "(0x%" Px ")\n",
+                 reinterpret_cast<intptr_t>(this),
+                 reinterpret_cast<intptr_t>(&zone_));
+  }
+}
+
 }  // namespace dart