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diff --git a/chromium/media/base/limits.h b/chromium/media/base/limits.h
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+// Copyright (c) 2011 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.
+
+// Contains limit definition constants for the media subsystem.
+
+#ifndef MEDIA_BASE_LIMITS_H_
+#define MEDIA_BASE_LIMITS_H_
+
+#include "base/basictypes.h"
+
+namespace media {
+
+namespace limits {
+
+enum {
+  // Maximum possible dimension (width or height) for any video.
+  kMaxDimension = (1 << 15) - 1,  // 32767
+
+  // Maximum possible canvas size (width multiplied by height) for any video.
+  kMaxCanvas = (1 << (14 * 2)),  // 16384 x 16384
+
+  // Total number of video frames which are populating in the pipeline.
+  kMaxVideoFrames = 4,
+
+  // The following limits are used by AudioParameters::IsValid().
+  //
+  // A few notes on sample rates of common formats:
+  //   - AAC files are limited to 96 kHz.
+  //   - MP3 files are limited to 48 kHz.
+  //   - Vorbis used to be limited to 96 KHz, but no longer has that
+  //     restriction.
+  //   - Most PC audio hardware is limited to 192 KHz.
+  kMaxSampleRate = 192000,
+  kMinSampleRate = 3000,
+  kMaxChannels = 32,
+  kMaxBytesPerSample = 4,
+  kMaxBitsPerSample = kMaxBytesPerSample * 8,
+  kMaxSamplesPerPacket = kMaxSampleRate,
+  kMaxPacketSizeInBytes =
+      kMaxBytesPerSample * kMaxChannels * kMaxSamplesPerPacket,
+
+  // This limit is used by ParamTraits<VideoCaptureParams>.
+  kMaxFramesPerSecond = 1000,
+};
+
+}  // namespace limits
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_LIMITS_H_