Remove more things

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h
index 15c25621b41b78e5bb3e8daa1a1c520307c50b8d..a8ae468eb9eaa3ca200b3dc339a35d413a079c25 100644
--- a/runtime/vm/isolate.h
+++ b/runtime/vm/isolate.h
@@ -19,7 +19,7 @@
 #include "vm/os_thread.h"
 #include "vm/timeline.h"
 #include "vm/timer.h"
-#include "vm/trace_buffer.h"
+#include "vm/token_position.h"
 
 namespace dart {
 
@@ -493,13 +493,6 @@ class Isolate : public BaseIsolate {
     return object_id_ring_;
   }
 
-  void set_trace_buffer(TraceBuffer* buffer) {
-    trace_buffer_ = buffer;
-  }
-  TraceBuffer* trace_buffer() {
-    return trace_buffer_;
-  }
-
   DeoptContext* deopt_context() const { return deopt_context_; }
   void set_deopt_context(DeoptContext* value) {
     ASSERT(value == NULL || deopt_context_ == NULL);
@@ -807,9 +800,6 @@ class Isolate : public BaseIsolate {
   // Ring buffer of objects assigned an id.
   ObjectIdRing* object_id_ring_;
 
-  // Trace buffer support.
-  TraceBuffer* trace_buffer_;
-
   VMTagCounters vm_tag_counters_;
   RawGrowableObjectArray* tag_table_;