Initial version of Blimp BlobCache.

blimp/common/blob_cache/in_memory_blob_cache.h

Index: blimp/common/blob_cache/in_memory_blob_cache.h
diff --git a/blimp/common/blob_cache/in_memory_blob_cache.h b/blimp/common/blob_cache/in_memory_blob_cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..0d43e8ab1c9b211b33a4288f549e83dcd9c55ef4
--- /dev/null
+++ b/blimp/common/blob_cache/in_memory_blob_cache.h
@@ -0,0 +1,38 @@
+// Copyright 2016 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.
+
+#ifndef BLIMP_COMMON_BLOB_CACHE_IN_MEMORY_BLOB_CACHE_H_
+#define BLIMP_COMMON_BLOB_CACHE_IN_MEMORY_BLOB_CACHE_H_
+
+#include <map>
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "blimp/common/blimp_common_export.h"
+#include "blimp/common/blob_cache/blob_cache.h"
+
+namespace blimp {
+
+// InMemoryBlobCache provides an in-memory implementation of BlobCache that
+// never evicts items.
+class BLIMP_COMMON_EXPORT InMemoryBlobCache : public BlobCache {
+ public:
+  InMemoryBlobCache();
+  ~InMemoryBlobCache() override;
+
+  // BlobCache implementation.
+  bool Contains(BlobId& id) const override;
+  void Put(BlobId& id, BlobData data) override;
+  BlobData Get(BlobId& id) const override;
+
+ private:
+  std::map<BlobId, BlobData> cache_;
+
+  DISALLOW_COPY_AND_ASSIGN(InMemoryBlobCache);
+};
+
+}  // namespace blimp
+
+#endif  // BLIMP_COMMON_BLOB_CACHE_IN_MEMORY_BLOB_CACHE_H_