[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/Source/modules/crypto/Crypto.cpp

 /*
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 32 matching lines @@
          type == DOMArrayBufferView::kTypeUint8 ||
          type == DOMArrayBufferView::kTypeUint8Clamped ||
          type == DOMArrayBufferView::kTypeInt16 ||
          type == DOMArrayBufferView::kTypeUint16 ||
          type == DOMArrayBufferView::kTypeInt32 ||
          type == DOMArrayBufferView::kTypeUint32;
 }
 
 }  // namespace
 
-DOMArrayBufferView* Crypto::getRandomValues(DOMArrayBufferView* array,
-                                            ExceptionState& exception_state) {
-  ASSERT(array);
-  if (!IsIntegerArray(array)) {
+NotShared<DOMArrayBufferView> Crypto::getRandomValues(
+    NotShared<DOMArrayBufferView> array,
+    ExceptionState& exception_state) {
+  DCHECK(array);
+  if (!IsIntegerArray(array.View())) {
     exception_state.ThrowDOMException(
         kTypeMismatchError,
         String::Format("The provided ArrayBufferView is of type '%s', which is "
                        "not an integer array type.",
-                       array->TypeName()));
-    return nullptr;
+                       array.View()->TypeName()));
+    return NotShared<DOMArrayBufferView>(nullptr);
   }
-  if (array->byteLength() > 65536) {
+  if (array.View()->byteLength() > 65536) {
     exception_state.ThrowDOMException(
         kQuotaExceededError,
         String::Format("The ArrayBufferView's byte length (%u) exceeds the "
                        "number of bytes of entropy available via this API "
                        "(65536).",
-                       array->byteLength()));
-    return nullptr;
+                       array.View()->byteLength()));
+    return NotShared<DOMArrayBufferView>(nullptr);
   }
-  CryptographicallyRandomValues(array->BaseAddress(), array->byteLength());
+  CryptographicallyRandomValues(array.View()->BaseAddress(),
+                                array.View()->byteLength());
   return array;
 }
 
 SubtleCrypto* Crypto::subtle() {
   if (!subtle_crypto_)
     subtle_crypto_ = SubtleCrypto::Create();
   return subtle_crypto_.Get();
 }
 
 DEFINE_TRACE(Crypto) {
   visitor->Trace(subtle_crypto_);
 }
 
 }  // namespace blink