Update Assembler::TryAllocate to support inline allocation tracing

runtime/vm/assembler_x64.h

Index: runtime/vm/assembler_x64.h
diff --git a/runtime/vm/assembler_x64.h b/runtime/vm/assembler_x64.h
index 214c9819e432569f9e5b203a1e2f0b36426088d8..56cff9caaca4b7e570873cb207f93d68c992393b 100644
--- a/runtime/vm/assembler_x64.h
+++ b/runtime/vm/assembler_x64.h
@@ -994,6 +994,12 @@ class Assembler : public ValueObject {
                                      intptr_t instance_size,
                                      Heap::Space space);
 
+  // If allocation tracing for |cid| is enabled, will jump to |trace| label,
+  // which will allocate in the runtime where tracing occurs.
+  void MaybeTraceAllocation(intptr_t cid,
+                            Label* trace,
+                            bool near_jump);
+
   // Inlined allocation of an instance of class 'cls', code has no runtime
   // calls. Jump to 'failure' if the instance cannot be allocated here.
   // Allocated instance is returned in 'instance_reg'.
@@ -1129,6 +1135,8 @@ class Assembler : public ValueObject {
                                      Heap::Space space,
                                      Address* count_address,
                                      Address* size_address);
+  void ComputeHeapStatsStateAddressForCid(intptr_t cid,
+                                          Address* state_address);
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };