Refactor generating lazy deoptimization descriptors.

runtime/vm/flow_graph_compiler.h

Index: runtime/vm/flow_graph_compiler.h
===================================================================
--- runtime/vm/flow_graph_compiler.h	(revision 40149)
+++ runtime/vm/flow_graph_compiler.h	(working copy)
@@ -320,6 +320,12 @@
 
   void TryIntrinsify();
 
+  void RecordCallInfo(intptr_t token_pos,
+                      RawPcDescriptors::Kind kind,
+                      intptr_t deopt_id,
+                      LocationSummary* locs,
+                      intptr_t input_count_adjustment);
+
   void GenerateRuntimeCall(intptr_t token_pos,
                            intptr_t deopt_id,
                            const RuntimeEntry& entry,
@@ -445,12 +451,8 @@
                             intptr_t deopt_id,
                             intptr_t token_pos);
 
-  void RecordSafepoint(LocationSummary* locs);
-
   Label* AddDeoptStub(intptr_t deopt_id, ICData::DeoptReasonId reason);
 
-  void AddDeoptIndexAtCall(intptr_t deopt_id, intptr_t token_pos);
-
   void AddSlowPathCode(SlowPathCode* slow_path);
 
   void FinalizeExceptionHandlers(const Code& code);
@@ -506,8 +508,14 @@
 
   void EmitFrameEntry();
 
+  void RecordSafepoint(LocationSummary* locs);
+
   void AddStaticCallTarget(const Function& function);
 
+  void AddDeoptIndexAtCall(intptr_t deopt_id,
+                           intptr_t token_pos,
+                           intptr_t input_count);
+
   void GenerateDeferredCode();
 
   void EmitInstructionPrologue(Instruction* instr);