Revert of Use a WeakCell in the CallIC type vector.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 864fbadbba4b2c0f7b0208ea00aaf89835c3eda4..b5ea4427c3369c91190e7c95c08fb16c06a54d58 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -63,7 +63,6 @@
   V(BinaryOpWithAllocationSite)             \
   V(CompareNilIC)                           \
   V(CreateAllocationSite)                   \
-  V(CreateWeakCell)                         \
   V(ElementsTransitionAndStore)             \
   V(FastCloneShallowArray)                  \
   V(FastCloneShallowObject)                 \
@@ -677,17 +676,6 @@
 };
 
 
-class CreateWeakCellStub : public HydrogenCodeStub {
- public:
-  explicit CreateWeakCellStub(Isolate* isolate) : HydrogenCodeStub(isolate) {}
-
-  static void GenerateAheadOfTime(Isolate* isolate);
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(CreateWeakCell);
-  DEFINE_HYDROGEN_CODE_STUB(CreateWeakCell, HydrogenCodeStub);
-};
-
-
 class InstanceofStub: public PlatformCodeStub {
  public:
   enum Flags {