[osr] Increase Code::profiler_ticks to 28 bits.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 16938972ba28f1a2af618a731cb2314502adf6d2..fc25ba2485fcb557f28bd61d0a70baa673ed4b44 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5333,8 +5333,7 @@ class Code: public HeapObject {
   class FullCodeFlagsIsCompiledOptimizable: public BitField<bool, 2, 1> {};
   class FullCodeFlagsHasRelocInfoForSerialization
       : public BitField<bool, 3, 1> {};
-
-  static const int kProfilerTicksOffset = kFullCodeFlags + 1;
+  class ProfilerTicksField : public BitField<int, 4, 28> {};
 
   // Flags layout.  BitField<type, shift, size>.
   class ICStateField : public BitField<InlineCacheState, 0, 4> {};