Added static assert to BitField to ensure the contents fit within the field

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 5451 matching lines @@
       : public BitField<bool, 2, 1> {};
   // Bit 3 in this bitfield is unused.
   class ProfilerTicksField : public BitField<int, 4, 28> {};
 
   // Flags layout.  BitField<type, shift, size>.
   class HasUnwindingInfoField : public BitField<bool, 0, 1> {};
   class CacheHolderField
       : public BitField<CacheHolderFlag, HasUnwindingInfoField::kNext, 2> {};
   class KindField : public BitField<Kind, CacheHolderField::kNext, 5> {};
   STATIC_ASSERT(NUMBER_OF_KINDS <= KindField::kMax);
-  class ExtraICStateField : public BitField<ExtraICState, KindField::kNext,
-                                            PlatformSmiTagging::kSmiValueSize -
-                                                KindField::kNext + 1> {};
+  class ExtraICStateField
+      : public BitField<ExtraICState, KindField::kNext,
+                        PlatformSmiTagging::kSmiValueSize - KindField::kNext> {
+  };
 
   // KindSpecificFlags1 layout (STUB, BUILTIN and OPTIMIZED_FUNCTION)
   static const int kStackSlotsFirstBit = 0;
   static const int kStackSlotsBitCount = 24;
   static const int kMarkedForDeoptimizationBit =
       kStackSlotsFirstBit + kStackSlotsBitCount;
   static const int kIsTurbofannedBit = kMarkedForDeoptimizationBit + 1;
   static const int kCanHaveWeakObjects = kIsTurbofannedBit + 1;
   // Could be moved to overlap previous bits when we need more space.
   static const int kIsConstructStub = kCanHaveWeakObjects + 1;
@@ skipping 5688 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_