1 files changed, 39 insertions, 0 deletions
diff --git a/chromium/cc/resources/memory_history.cc b/chromium/cc/resources/memory_history.cc
new file mode 100644
index 00000000000..a2f8b6ee113
--- /dev/null
+++ b/chromium/cc/resources/memory_history.cc
@@ -0,0 +1,39 @@
+// Copyright 2012 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 "cc/resources/memory_history.h"
+
+#include <limits>
+
+namespace cc {
+
+// static
+scoped_ptr<MemoryHistory> MemoryHistory::Create() {
+  return make_scoped_ptr(new MemoryHistory());
+}
+
+MemoryHistory::MemoryHistory() {}
+
+void MemoryHistory::SaveEntry(const MemoryHistory::Entry& entry) {
+  ring_buffer_.SaveToBuffer(entry);
+}
+
+void MemoryHistory::GetMinAndMax(size_t* min, size_t* max) const {
+  *min = std::numeric_limits<size_t>::max();
+  *max = 0;
+
+  for (RingBufferType::Iterator it = ring_buffer_.Begin(); it; ++it) {
+    size_t bytes_total = it->bytes_total();
+
+    if (bytes_total < *min)
+      *min = bytes_total;
+    if (bytes_total > *max)
+      *max = bytes_total;
+  }
+
+  if (*min > *max)
+    *min = *max;
+}
+
+}  // namespace cc