Fix for assertion failures appeared after StoreTransitionStub implementation.

src/code-stubs-hydrogen.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/bailout-reason.h"
 #include "src/code-stubs.h"
 #include "src/field-index.h"
 #include "src/hydrogen.h"
@@ skipping 782 matching lines @@
                         Add<HConstant>((Page::kMaxRegularHeapObjectSize -
                                         FixedArray::kHeaderSize) >>
                                        ElementsKindToShiftSize(kind)));
 
       // Reuse this code for properties backing store allocation.
       HValue* new_properties =
           BuildAllocateAndInitializeArray(kind, new_capacity);
 
       BuildCopyProperties(properties, new_properties, length, new_capacity);
 
-      // Store the new value into the "extended" object.
       Add<HStoreNamedField>(object, HObjectAccess::ForPropertiesPointer(),
                             new_properties);
     }
     // Fall through.
     case StoreTransitionStub::StoreMapAndValue:
+      // Store the new value into the "extended" object.
       BuildStoreNamedField(
           object, GetParameter(StoreTransitionDescriptor::kValueIndex),
           casted_stub()->index(), casted_stub()->representation(), true);
     // Fall through.
 
     case StoreTransitionStub::StoreMapOnly:
       // And finally update the map.
       Add<HStoreNamedField>(object, HObjectAccess::ForMap(),
                             GetParameter(StoreTransitionDescriptor::kMapIndex));
       break;
@@ skipping 1193 matching lines @@
 
   // Probe the stub cache.
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
       Code::ComputeHandlerFlags(Code::LOAD_IC));
   Add<HTailCallThroughMegamorphicCache>(receiver, name, flags);
 
   // We never continue.
   return graph()->GetConstant0();
 }
 } }  // namespace v8::internal