Fix OSR for nested loops.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c97a6c9cf4673143b1479b9204f9216e1cdf1a31..4dd387158a6ff422dde7d3dec2403d7c7629424a 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4503,13 +4503,13 @@ class Code: public HeapObject {
   inline unsigned safepoint_table_offset();
   inline void set_safepoint_table_offset(unsigned offset);
 
-  // [stack_check_table_start]: For kind FUNCTION, the offset in the
-  // instruction stream where the stack check table starts.
-  inline unsigned stack_check_table_offset();
-  inline void set_stack_check_table_offset(unsigned offset);
+  // [back_edge_table_start]: For kind FUNCTION, the offset in the
+  // instruction stream where the back edge table starts.
+  inline unsigned back_edge_table_offset();
+  inline void set_back_edge_table_offset(unsigned offset);
 
-  inline bool stack_check_patched_for_osr();
-  inline void set_stack_check_patched_for_osr(bool value);
+  inline bool back_edges_patched_for_osr();
+  inline void set_back_edges_patched_for_osr(bool value);
 
   // [check type]: For kind CALL_IC, tells how to check if the
   // receiver is valid for the given call.
@@ -4540,10 +4540,6 @@ class Code: public HeapObject {
   // Get the safepoint entry for the given pc.
   SafepointEntry GetSafepointEntry(Address pc);
 
-  // Mark this code object as not having a stack check table.  Assumes kind
-  // is FUNCTION.
-  void SetNoStackCheckTable();
-
   // Find the first map in an IC stub.
   Map* FindFirstMap();
   void FindAllMaps(MapHandleList* maps);
@@ -4793,8 +4789,8 @@ class Code: public HeapObject {
       kStubMajorKeyFirstBit, kStubMajorKeyBits> {};  // NOLINT
 
   // KindSpecificFlags2 layout (FUNCTION)
-  class StackCheckTableOffsetField: public BitField<int, 0, 31> {};
-  class StackCheckPatchedForOSRField: public BitField<bool, 31, 1> {};
+  class BackEdgeTableOffsetField: public BitField<int, 0, 31> {};
+  class BackEdgesPatchedForOSRField: public BitField<bool, 31, 1> {};
 
   // Signed field cannot be encoded using the BitField class.
   static const int kArgumentsCountShift = 17;