[kernel] Stream everything. Replace .kernel_function with .kernel_offset

runtime/vm/flow_graph_inliner.cc

Index: runtime/vm/flow_graph_inliner.cc
diff --git a/runtime/vm/flow_graph_inliner.cc b/runtime/vm/flow_graph_inliner.cc
index 8f8eeecc88ec002fa95f244265c36c327e2e5c79..3ca8e39069c58780fa1d0da781150e69d5f7defc 100644
--- a/runtime/vm/flow_graph_inliner.cc
+++ b/runtime/vm/flow_graph_inliner.cc
@@ -802,12 +802,10 @@ class CallSiteInliner : public ValueObject {
             new (Z) InlineExitCollector(caller_graph_, call);
         FlowGraph* callee_graph;
         if (UseKernelFrontEndFor(parsed_function)) {
-          kernel::TreeNode* node = static_cast<kernel::TreeNode*>(
-              parsed_function->function().kernel_function());
-
           kernel::FlowGraphBuilder builder(
-              node, parsed_function, *ic_data_array, exit_collector,
-              Compiler::kNoOSRDeoptId, caller_graph_->max_block_id() + 1);
+              parsed_function->function().kernel_offset(), parsed_function,
+              *ic_data_array, exit_collector, Compiler::kNoOSRDeoptId,
+              caller_graph_->max_block_id() + 1);
           {
             CSTAT_TIMER_SCOPE(thread(), graphinliner_build_timer);
             callee_graph = builder.BuildGraph();