WebMessaging: Send transferable ArrayBuffers by copy-and-neuter semantics

third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h

 /*
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 96 matching lines @@
   // 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec and generates
   // exceptions as appropriate.
   // Returns true if the array was filled, or false if the passed value was not
   // of an appropriate type.
   static bool extractTransferables(v8::Isolate*,
                                    v8::Local<v8::Value>,
                                    int,
                                    Transferables&,
                                    ExceptionState&);
 
+  // Helper function which pulls ArrayBufferContents out of an ArrayBufferArray
+  // and neuters the ArrayBufferArray.  Returns nullptr if there is an
+  // exception.
+  static std::unique_ptr<ArrayBufferContentsArray> transferArrayBufferContents(
+      v8::Isolate*,
+      const ArrayBufferArray&,
+      ExceptionState&);
+
   // Informs the V8 about external memory allocated and owned by this object.
   // Large values should contribute to GC counters to eventually trigger a GC,
   // otherwise flood of postMessage() can cause OOM.
   // Ok to invoke multiple times (only adds memory once).
   // The memory registration is revoked automatically in destructor.
   void registerMemoryAllocatedWithCurrentScriptContext();
 
-  // Returns true if the value contains a transferable ArrayBuffer.
-  bool containsTransferableArrayBuffer() const;
-
   String& data() { return m_data; }
   BlobDataHandleMap& blobDataHandles() { return m_blobDataHandles; }
   ArrayBufferContentsArray* getArrayBufferContentsArray() {
     return m_arrayBufferContentsArray.get();
   }
   ImageBitmapContentsArray* getImageBitmapContentsArray() {
     return m_imageBitmapContentsArray.get();
   }
 
  private:
@@ skipping 19 matching lines @@
   String m_data;
   std::unique_ptr<ArrayBufferContentsArray> m_arrayBufferContentsArray;
   std::unique_ptr<ImageBitmapContentsArray> m_imageBitmapContentsArray;
   BlobDataHandleMap m_blobDataHandles;
   intptr_t m_externallyAllocatedMemory;
 };
 
 }  // namespace blink
 
 #endif  // SerializedScriptValue_h