[VM-Compiler] Don't inline if we don't have inlining budget enough to fully inline.

runtime/vm/compiler/backend/inliner.h

Index: runtime/vm/compiler/backend/inliner.h
diff --git a/runtime/vm/compiler/backend/inliner.h b/runtime/vm/compiler/backend/inliner.h
index 4fdd65d1ff29392b811ca0330121ba9c508f69fb..fe243e7fe09a1ff65cdaa987906e86af15d11332 100644
--- a/runtime/vm/compiler/backend/inliner.h
+++ b/runtime/vm/compiler/backend/inliner.h
@@ -32,8 +32,9 @@ class FlowGraphInliner : ValueObject {
                    GrowableArray<intptr_t>* inlining_black_list,
                    Precompiler* precompiler);
 
-  // The flow graph is destructively updated upon inlining.
-  void Inline();
+  // The flow graph is destructively updated upon inlining.  Returns the max
+  // depth that we inlined.
+  int Inline();
 
   // Compute graph info if it was not already computed or if 'force' is true.
   static void CollectGraphInfo(FlowGraph* flow_graph, bool force = false);