Move deopt_id and related helpers/definitions from Isolate to Thread

runtime/vm/flow_graph_compiler.h

Index: runtime/vm/flow_graph_compiler.h
diff --git a/runtime/vm/flow_graph_compiler.h b/runtime/vm/flow_graph_compiler.h
index 14517762c57dfd6394cedc781c52fe41bbd88f1e..df9f7e4f9497bc722c6548ba877a584b1adb5daa 100644
--- a/runtime/vm/flow_graph_compiler.h
+++ b/runtime/vm/flow_graph_compiler.h
@@ -525,6 +525,7 @@ class FlowGraphCompiler : public ValueObject {
     return *deopt_id_to_ic_data_;
   }
 
+  Thread* thread() const { return thread_; }
   Isolate* isolate() const { return isolate_; }
   Zone* zone() const { return zone_; }
 
@@ -681,6 +682,7 @@ class FlowGraphCompiler : public ValueObject {
     DISALLOW_COPY_AND_ASSIGN(StaticCallsStruct);
   };
 
+  Thread* thread_;
   Isolate* isolate_;
   Zone* zone_;
   Assembler* assembler_;