Revert of Use in-object fields instead of private symbols for regexp slots.

src/crankshaft/hydrogen-instructions.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_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 #define V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 6177 matching lines @@
 
   static HObjectAccess ForJSArrayBufferViewByteLength() {
     return HObjectAccess::ForObservableJSObjectOffset(
         JSArrayBufferView::kByteLengthOffset);
   }
 
   static HObjectAccess ForJSGlobalObjectNativeContext() {
     return HObjectAccess(kInobject, JSGlobalObject::kNativeContextOffset);
   }
 
-  static HObjectAccess ForJSRegExpFlags() {
-    return HObjectAccess(kInobject, JSRegExp::kFlagsOffset);
-  }
-
-  static HObjectAccess ForJSRegExpSource() {
-    return HObjectAccess(kInobject, JSRegExp::kSourceOffset);
-  }
-
   static HObjectAccess ForJSCollectionTable() {
     return HObjectAccess::ForObservableJSObjectOffset(
         JSCollection::kTableOffset);
   }
 
   template <typename CollectionType>
   static HObjectAccess ForOrderedHashTableNumberOfBuckets() {
     return HObjectAccess(kInobject, CollectionType::kNumberOfBucketsOffset,
                          Representation::Smi());
   }
@@ skipping 1700 matching lines @@
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_