Initial version of Blimp BlobCache.

blimp/common/blob_cache/in_memory_blob_cache.cc

Index: blimp/common/blob_cache/in_memory_blob_cache.cc
diff --git a/blimp/common/blob_cache/in_memory_blob_cache.cc b/blimp/common/blob_cache/in_memory_blob_cache.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7dc2dd9baa840349d13c6b1d6ee7121cf8e88de4
--- /dev/null
+++ b/blimp/common/blob_cache/in_memory_blob_cache.cc
@@ -0,0 +1,40 @@
+// 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.
+
+#include "blimp/common/blob_cache/in_memory_blob_cache.h"
+
+#include "base/logging.h"
+#include "base/sha1.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+
+namespace blimp {
+
+InMemoryBlobCache::InMemoryBlobCache() {}
+
+InMemoryBlobCache::~InMemoryBlobCache() {}
+
+void InMemoryBlobCache::Put(const std::string& id,
+                            scoped_refptr<RefCountedVector> data) {
+  if (Contains(id)) {
+    DLOG(WARNING) << "Item with ID " << id << " already exists in cache.";

[vmpstr, 2016/04/15 18:18:54]

If this is not an expected scenario, then it should be a DCHECK/CHECK instead.
Otherwise, can you comment why this might happen?

[nyquist, 2016/04/16 00:25:29]

Done.

+    return;
+  }
+  map_.insert(std::make_pair(id, data));

[vmpstr, 2016/04/15 18:18:54]

you can std::move(data) here to avoid ref/unref if you want.

[nyquist, 2016/04/16 00:25:29]

Done.

+}
+
+bool InMemoryBlobCache::Contains(const std::string& id) const {
+  return map_.find(id) != map_.end();
+}
+
+scoped_refptr<RefCountedVector> InMemoryBlobCache::Get(
+    const std::string& id) const {
+  if (!Contains(id)) {
+    return nullptr;
+  }
+
+  return map_.find(id)->second;
+}
+
+}  // namespace blimp