Re-enable Object.observe and add enforcement for security invariants.

src/runtime.h

 // 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.
 
 #ifndef V8_RUNTIME_H_
 #define V8_RUNTIME_H_
 
 #include "allocation.h"
 #include "zone.h"
 
@@ skipping 293 matching lines @@
   /* Harmony events */ \
   F(SetMicrotaskPending, 1, 1) \
   F(RunMicrotasks, 0, 1) \
   \
   /* Harmony observe */ \
   F(IsObserved, 1, 1) \
   F(SetIsObserved, 1, 1) \
   F(GetObservationState, 0, 1) \
   F(ObservationWeakMapCreate, 0, 1) \
   F(IsAccessAllowedForObserver, 3, 1) \
+  F(ObjectWasCreatedInCurrentOrigin, 1, 1) \
   \
   /* Harmony typed arrays */ \
   F(ArrayBufferInitialize, 2, 1)\
   F(ArrayBufferSliceImpl, 3, 1) \
   F(ArrayBufferIsView, 1, 1) \
   F(ArrayBufferNeuter, 1, 1) \
   \
   F(TypedArrayInitializeFromArrayLike, 4, 1) \
   F(TypedArrayGetBuffer, 1, 1) \
   F(TypedArraySetFastCases, 3, 1) \
@@ skipping 564 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_