Make profiler work without Instructions -> Code pointer

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index f33cb12e2a466d269ef1ca8ec5668080a9cf4d91..ff744ba189d74102819bac26b6063521ac4d757b 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -626,6 +626,7 @@ class RawObject {
   friend class WeakProperty;  // StorePointer
   friend class Instance;  // StorePointer
   friend class StackFrame;  // GetCodeObject assertion.
+  friend class CodeLookupTableBuilder;  // profiler
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(RawObject);
@@ -1109,14 +1110,6 @@ class RawObjectPool : public RawObject {
 class RawInstructions : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Instructions);
 
-  RawObject** from() {
-    return reinterpret_cast<RawObject**>(&ptr()->code_);
-  }
-  RawCode* code_;
-  RawObject** to() {
-    return reinterpret_cast<RawObject**>(&ptr()->code_);
-  }
-
   int32_t size_;
 
   // Variable length data follows here.