import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

parser/html/nsHtml5OwningUTF16Buffer.h

@@ -0,0 +1,58 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsHtml5OwningUTF16Buffer_h
+#define nsHtml5OwningUTF16Buffer_h
+
+#include "nsHtml5UTF16Buffer.h"
+
+class nsHtml5OwningUTF16Buffer : public nsHtml5UTF16Buffer
+{
+  private:
+
+    /**
+     * Passes a buffer and its length to the superclass constructor.
+     */
+    explicit nsHtml5OwningUTF16Buffer(char16_t* aBuffer);
+
+  public:
+
+    /**
+     * Constructor for a parser key placeholder. (No actual buffer.)
+     * @param aKey a parser key
+     */
+    explicit nsHtml5OwningUTF16Buffer(void* aKey);
+
+protected:
+    /**
+     * Takes care of releasing the owned buffer.
+     */
+    ~nsHtml5OwningUTF16Buffer();
+
+public:
+    /**
+     * The next buffer in a queue.
+     */
+    RefPtr<nsHtml5OwningUTF16Buffer> next;
+
+    /**
+     * A parser key.
+     */
+    void* key;
+
+    static already_AddRefed<nsHtml5OwningUTF16Buffer>
+    FalliblyCreate(int32_t aLength);
+
+    /**
+     * Swap start, end and buffer fields with another object.
+     */
+    void Swap(nsHtml5OwningUTF16Buffer* aOther);
+
+    nsrefcnt AddRef();
+    nsrefcnt Release();
+  private:
+    nsAutoRefCnt mRefCnt;
+};
+
+#endif // nsHtml5OwningUTF16Buffer_h