Move Throw and ReThrow to the location based code generation.

runtime/vm/flow_graph_compiler_x64.h

Index: runtime/vm/flow_graph_compiler_x64.h
diff --git a/runtime/vm/flow_graph_compiler_x64.h b/runtime/vm/flow_graph_compiler_x64.h
index 93cd028774b48ab016e12f8074ba88e9117c41e1..b0619d326bd0de6834911467291a06ac196ebf11 100644
--- a/runtime/vm/flow_graph_compiler_x64.h
+++ b/runtime/vm/flow_graph_compiler_x64.h
@@ -50,6 +50,12 @@ class FlowGraphCompiler : public FlowGraphVisitor {
                       Register reg1,
                       Register reg2);
 
+
+  void GenerateCallRuntime(intptr_t cid,
+                           intptr_t token_index,
+                           intptr_t try_index,
+                           const RuntimeEntry& entry);
+
  private:
   friend class DeoptimizationStub;
 
@@ -123,10 +129,6 @@ class FlowGraphCompiler : public FlowGraphVisitor {
                     intptr_t try_index,
                     const ExternalLabel* label,
                     PcDescriptors::Kind kind);
-  void GenerateCallRuntime(intptr_t cid,
-                           intptr_t token_index,
-                           intptr_t try_index,
-                           const RuntimeEntry& entry);
   void AddCurrentDescriptor(PcDescriptors::Kind kind,
                             intptr_t cid,
                             intptr_t token_index,