Revert of Implement SharedArrayBuffer

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 0148ba4a16ccdaef4a7efbf832a6aba075e2bed9..f52f8b8cfc6b8725748de27ae5896924d222aa07 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -1920,13 +1920,6 @@
    */
   bool IsDataView() const;
 
-  /**
-   * Returns true if this value is a SharedArrayBuffer.
-   * This is an experimental feature.
-   */
-  bool IsSharedArrayBuffer() const;
-
-
   V8_WARN_UNUSED_RESULT MaybeLocal<Boolean> ToBoolean(
       Local<Context> context) const;
   V8_WARN_UNUSED_RESULT MaybeLocal<Number> ToNumber(
@@ -3351,7 +3344,7 @@
       ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized);
 
   /**
-   * Returns true if ArrayBuffer is externalized, that is, does not
+   * Returns true if ArrayBuffer is extrenalized, that is, does not
    * own its memory block.
    */
   bool IsExternal() const;
@@ -3633,105 +3626,6 @@
 
  private:
   DataView();
-  static void CheckCast(Value* obj);
-};
-
-
-/**
- * An instance of the built-in SharedArrayBuffer constructor.
- * This API is experimental and may change significantly.
- */
-class V8_EXPORT SharedArrayBuffer : public Object {
- public:
-  /**
-   * The contents of an |SharedArrayBuffer|. Externalization of
-   * |SharedArrayBuffer| returns an instance of this class, populated, with a
-   * pointer to data and byte length.
-   *
-   * The Data pointer of SharedArrayBuffer::Contents is always allocated with
-   * |ArrayBuffer::Allocator::Allocate| by the allocator specified in
-   * v8::Isolate::CreateParams::array_buffer_allocator.
-   *
-   * This API is experimental and may change significantly.
-   */
-  class V8_EXPORT Contents {  // NOLINT
-   public:
-    Contents() : data_(NULL), byte_length_(0) {}
-
-    void* Data() const { return data_; }
-    size_t ByteLength() const { return byte_length_; }
-
-   private:
-    void* data_;
-    size_t byte_length_;
-
-    friend class SharedArrayBuffer;
-  };
-
-
-  /**
-   * Data length in bytes.
-   */
-  size_t ByteLength() const;
-
-  /**
-   * Create a new SharedArrayBuffer. Allocate |byte_length| bytes.
-   * Allocated memory will be owned by a created SharedArrayBuffer and
-   * will be deallocated when it is garbage-collected,
-   * unless the object is externalized.
-   */
-  static Local<SharedArrayBuffer> New(Isolate* isolate, size_t byte_length);
-
-  /**
-   * Create a new SharedArrayBuffer over an existing memory block.  The created
-   * array buffer is immediately in externalized state unless otherwise
-   * specified. The memory block will not be reclaimed when a created
-   * SharedArrayBuffer is garbage-collected.
-   */
-  static Local<SharedArrayBuffer> New(
-      Isolate* isolate, void* data, size_t byte_length,
-      ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized);
-
-  /**
-   * Returns true if SharedArrayBuffer is externalized, that is, does not
-   * own its memory block.
-   */
-  bool IsExternal() const;
-
-  /**
-   * Make this SharedArrayBuffer external. The pointer to underlying memory
-   * block and byte length are returned as |Contents| structure. After
-   * SharedArrayBuffer had been etxrenalized, it does no longer owns the memory
-   * block. The caller should take steps to free memory when it is no longer
-   * needed.
-   *
-   * The memory block is guaranteed to be allocated with |Allocator::Allocate|
-   * by the allocator specified in
-   * v8::Isolate::CreateParams::array_buffer_allocator.
-   *
-   */
-  Contents Externalize();
-
-  /**
-   * Get a pointer to the ArrayBuffer's underlying memory block without
-   * externalizing it. If the ArrayBuffer is not externalized, this pointer
-   * will become invalid as soon as the ArrayBuffer became garbage collected.
-   *
-   * The embedder should make sure to hold a strong reference to the
-   * ArrayBuffer while accessing this pointer.
-   *
-   * The memory block is guaranteed to be allocated with |Allocator::Allocate|
-   * by the allocator specified in
-   * v8::Isolate::CreateParams::array_buffer_allocator.
-   */
-  Contents GetContents();
-
-  V8_INLINE static SharedArrayBuffer* Cast(Value* obj);
-
-  static const int kInternalFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT;
-
- private:
-  SharedArrayBuffer();
   static void CheckCast(Value* obj);
 };
 
@@ -6852,7 +6746,7 @@
   static const int kJSObjectHeaderSize = 3 * kApiPointerSize;
   static const int kFixedArrayHeaderSize = 2 * kApiPointerSize;
   static const int kContextHeaderSize = 2 * kApiPointerSize;
-  static const int kContextEmbedderDataIndex = 79;
+  static const int kContextEmbedderDataIndex = 78;
   static const int kFullStringRepresentationMask = 0x07;
   static const int kStringEncodingMask = 0x4;
   static const int kExternalTwoByteRepresentationTag = 0x02;
@@ -7923,14 +7817,6 @@
 }
 
 
-SharedArrayBuffer* SharedArrayBuffer::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
-  CheckCast(value);
-#endif
-  return static_cast<SharedArrayBuffer*>(value);
-}
-
-
 Function* Function::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);