Eliminate copies of encoded image data

third_party/WebKit/Source/platform/graphics/ThreadSafeDataTransport.cpp

Index: third_party/WebKit/Source/platform/graphics/ThreadSafeDataTransport.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/ThreadSafeDataTransport.cpp b/third_party/WebKit/Source/platform/graphics/ThreadSafeDataTransport.cpp
deleted file mode 100644
index f191017a2e507b284faa4d1ed72cfc2aefc0647d..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/graphics/ThreadSafeDataTransport.cpp
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * Copyright (C) 2012 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
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "platform/graphics/ThreadSafeDataTransport.h"
-
-#include "platform/SharedBuffer.h"
-
-namespace blink {
-
-ThreadSafeDataTransport::ThreadSafeDataTransport()
-    : m_readBuffer(SharedBuffer::create())
-    , m_allDataReceived(false)
-    , m_readPosition(0)
-{
-}
-
-ThreadSafeDataTransport::~ThreadSafeDataTransport()
-{
-}
-
-void ThreadSafeDataTransport::setData(SharedBuffer* buffer, bool allDataReceived)
-{
-    ASSERT(buffer->size() >= m_readPosition);
-    Vector<RefPtr<SharedBuffer>> newBufferQueue;
-
-    const char* segment = 0;
-    while (size_t length = buffer->getSomeData(segment, m_readPosition)) {
-        m_readPosition += length;
-        newBufferQueue.append(SharedBuffer::create(segment, length));
-    }
-
-    MutexLocker locker(m_mutex);
-
-    // If all data was previously received, don't append more to it.
-    RELEASE_ASSERT(!(m_allDataReceived && newBufferQueue.size()));
-
-    m_newBufferQueue.appendVector(newBufferQueue);
-    newBufferQueue.clear();
-    m_allDataReceived = allDataReceived;
-}
-
-void ThreadSafeDataTransport::data(SharedBuffer** buffer, bool* allDataReceived)
-{
-    ASSERT(buffer);
-    ASSERT(allDataReceived);
-    Vector<RefPtr<SharedBuffer>> newBufferQueue;
-    {
-        MutexLocker lock(m_mutex);
-        m_newBufferQueue.swap(newBufferQueue);
-        *allDataReceived = m_allDataReceived;
-    }
-    for (size_t i = 0; i < newBufferQueue.size(); ++i)
-        m_readBuffer->append(newBufferQueue[i].get());
-    *buffer = m_readBuffer.get();
-}
-
-bool ThreadSafeDataTransport::hasNewData()
-{
-    MutexLocker lock(m_mutex);
-    return !m_newBufferQueue.isEmpty();
-}
-
-} // namespace blink