Remove custom weak handling of monomorphic IC.

src/objects-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/heap/objects-visiting.h"
 #include "src/jsregexp.h"
@@ skipping 666 matching lines @@
   if (!CanContainWeakObjects()) return;
   DisallowHeapAllocation no_gc;
   Isolate* isolate = GetIsolate();
   HandleScope scope(isolate);
   int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
   for (RelocIterator it(this, mode_mask); !it.done(); it.next()) {
     Object* obj = it.rinfo()->target_object();
     if (IsWeakObject(obj)) {
       if (obj->IsMap()) {
         Map* map = Map::cast(obj);
-        DependentCode::DependencyGroup group = is_optimized_code() ?
-            DependentCode::kWeakCodeGroup : DependentCode::kWeakICGroup;
-        CHECK(map->dependent_code()->Contains(group, this));
+        CHECK(map->dependent_code()->Contains(DependentCode::kWeakCodeGroup,
+                                              this));
       } else if (obj->IsJSObject()) {
         Object* raw_table = GetIsolate()->heap()->weak_object_to_code_table();
         WeakHashTable* table = WeakHashTable::cast(raw_table);
         Handle<Object> key_obj(obj, isolate);
         CHECK(DependentCode::cast(table->Lookup(key_obj))->Contains(
             DependentCode::kWeakCodeGroup, this));
       }
     }
   }
 }
@@ skipping 573 matching lines @@
     while (map != heap->roots_array_start()[i++]) {
       CHECK_LT(i, Heap::kStrongRootListLength);
     }
   }
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal