When generating CodeSourceMaps, reassign function ids once per function instead of once per inlinin…

runtime/vm/code_descriptors.h

Index: runtime/vm/code_descriptors.h
diff --git a/runtime/vm/code_descriptors.h b/runtime/vm/code_descriptors.h
index 2dbe90332384c0e595cc99df4a36b05cdc11fed9..2298dc0166cdfb129458d70cfefdcc18cf637bd6 100644
--- a/runtime/vm/code_descriptors.h
+++ b/runtime/vm/code_descriptors.h
@@ -241,6 +241,8 @@ class CodeSourceMapBuilder : public ZoneAllocated {
   RawCodeSourceMap* Finalize();
 
  private:
+  intptr_t GetFunctionId(intptr_t inline_id);
+
   void BufferChangePosition(TokenPosition pos) {
     buffered_token_pos_stack_.Last() = pos;
   }
@@ -257,7 +259,7 @@ class CodeSourceMapBuilder : public ZoneAllocated {
   }
   void WritePush(intptr_t inline_id) {
     stream_.Write<uint8_t>(kPushFunction);
-    stream_.Write<int32_t>(inline_id);
+    stream_.Write<int32_t>(GetFunctionId(inline_id));
     written_inline_id_stack_.Add(inline_id);
     written_token_pos_stack_.Add(kInitialPosition);
   }
@@ -295,6 +297,8 @@ class CodeSourceMapBuilder : public ZoneAllocated {
   const GrowableArray<TokenPosition>& inline_id_to_token_pos_;
   const GrowableArray<const Function*>& inline_id_to_function_;
 
+  const GrowableObjectArray& inlined_functions_;
+
   uint8_t* buffer_;
   WriteStream stream_;