Reland: BackgroundHTMLParser: Introduce ParsedChunkQueue to pass ParsedChunks to main thread

third_party/WebKit/Source/core/html/parser/ParsedChunkQueue.cpp

Index: third_party/WebKit/Source/core/html/parser/ParsedChunkQueue.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/ParsedChunkQueue.cpp b/third_party/WebKit/Source/core/html/parser/ParsedChunkQueue.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..338717a96ec9e99f05080761573c69a5d3c6b5b1
--- /dev/null
+++ b/third_party/WebKit/Source/core/html/parser/ParsedChunkQueue.cpp
@@ -0,0 +1,42 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/html/parser/ParsedChunkQueue.h"
+
+namespace blink {
+
+ParsedChunkQueue::ParsedChunkQueue()
+{
+}
+
+ParsedChunkQueue::~ParsedChunkQueue()
+{
+}
+
+bool ParsedChunkQueue::enqueue(PassOwnPtr<HTMLDocumentParser::ParsedChunk> chunk)
+{
+    MutexLocker locker(m_mutex);
+
+    bool wasEmpty = m_pendingChunks.isEmpty();
+    m_pendingChunks.append(chunk);
+    return wasEmpty;
+}
+
+void ParsedChunkQueue::clear()
+{
+    MutexLocker locker(m_mutex);
+
+    m_pendingChunks.clear();
+}
+
+void ParsedChunkQueue::takeAll(Vector<OwnPtr<HTMLDocumentParser::ParsedChunk>>& vector)
+{
+    MutexLocker locker(m_mutex);
+
+    ASSERT(vector.isEmpty());
+    m_pendingChunks.swap(vector);
+}
+
+} // namespace blink