Revert of Remove SIMD.js from V8.

include/v8-profiler.h

 // Copyright 2010 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_V8_PROFILER_H_
 #define V8_V8_PROFILER_H_
 
 #include <unordered_set>
 #include <vector>
 #include "v8.h"  // NOLINT(build/include)
@@ skipping 375 matching lines @@
     kObject = 3,         // A JS object (except for arrays and strings).
     kCode = 4,           // Compiled code.
     kClosure = 5,        // Function closure.
     kRegExp = 6,         // RegExp.
     kHeapNumber = 7,     // Number stored in the heap.
     kNative = 8,         // Native object (not from V8 heap).
     kSynthetic = 9,      // Synthetic object, usualy used for grouping
                          // snapshot items together.
     kConsString = 10,    // Concatenated string. A pair of pointers to strings.
     kSlicedString = 11,  // Sliced string. A fragment of another string.
-    kSymbol = 12         // A Symbol (ES6).
+    kSymbol = 12,        // A Symbol (ES6).
+    kSimdValue = 13      // A SIMD value stored in the heap (Proposed ES7).
   };
 
   /** Returns node type (see HeapGraphNode::Type). */
   Type GetType() const;
 
   /**
    * Returns node name. Depending on node's type this can be the name
    * of the constructor (for objects), the name of the function (for
    * closures), string value, or an empty string (for compiled code).
    */
@@ skipping 501 matching lines @@
   uint32_t index;  // Index of the time interval that was changed.
   uint32_t count;  // New value of count field for the interval with this index.
   uint32_t size;  // New value of size field for the interval with this index.
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_V8_PROFILER_H_