CachedMetadata support for ServiceWorker script.

Source/core/workers/WorkerScriptCachedMetadataHandler.cpp

Index: Source/core/workers/WorkerScriptCachedMetadataHandler.cpp
diff --git a/Source/core/workers/WorkerScriptCachedMetadataHandler.cpp b/Source/core/workers/WorkerScriptCachedMetadataHandler.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7c445d8f7235fdcbc6744a99e793a636581de50b
--- /dev/null
+++ b/Source/core/workers/WorkerScriptCachedMetadataHandler.cpp
@@ -0,0 +1,55 @@
+// 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/workers/WorkerScriptCachedMetadataHandler.h"
+
+#include "core/fetch/CachedMetadata.h"
+#include "core/workers/WorkerGlobalScope.h"
+
+namespace blink {
+
+WorkerScriptCachedMetadataHandler::WorkerScriptCachedMetadataHandler(WorkerGlobalScope* workerGlobalScope, const KURL& scriptURL, const Vector<char>* metaData)
+    : m_workerGlobalScope(workerGlobalScope)
+    , m_scriptURL(scriptURL)
+{
+    if (metaData)
+        m_cachedMetadata = CachedMetadata::deserialize(metaData->data(), metaData->size());
+}
+
+WorkerScriptCachedMetadataHandler::~WorkerScriptCachedMetadataHandler()
+{
+}
+
+void WorkerScriptCachedMetadataHandler::setCachedMetadata(unsigned dataTypeID, const char* data, size_t size, CacheType type)
+{
+    if (type != SendToPlatform)
+        return;
+    m_cachedMetadata = CachedMetadata::create(dataTypeID, data, size);
+    const Vector<char>& serializedData = m_cachedMetadata->serialize();
+    m_workerGlobalScope->setCachedMetadata(m_scriptURL, serializedData.data(), serializedData.size());
+}
+
+void WorkerScriptCachedMetadataHandler::clearCachedMetadata(CacheType type)
+{
+    if (type != SendToPlatform)
+        return;
+    m_cachedMetadata = nullptr;
+    m_workerGlobalScope->clearCachedMetadata(m_scriptURL);
+}
+
+CachedMetadata* WorkerScriptCachedMetadataHandler::cachedMetadata(unsigned dataTypeID) const
+{
+    if (!m_cachedMetadata || m_cachedMetadata->dataTypeID() != dataTypeID)
+        return nullptr;
+    return m_cachedMetadata.get();
+}
+
+String WorkerScriptCachedMetadataHandler::encoding() const
+{
+    return "";
+}
+
+} // namespace blink