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diff --git a/accel/video_pixel_format.h b/accel/video_pixel_format.h
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+// 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.
+// Note: ported from Chromium commit head: 3b7ce92816e2
+// Note: only necessary functions are ported from video_types.h
+
+#ifndef VIDEO_PIXEL_FORMAT_H_
+#define VIDEO_PIXEL_FORMAT_H_
+
+#include <string>
+
+namespace media {
+
+// Pixel formats roughly based on FOURCC labels, see:
+// http://www.fourcc.org/rgb.php and http://www.fourcc.org/yuv.php
+// Logged to UMA, so never reuse values. Leave gaps if necessary.
+// Ordered as planar, semi-planar, YUV-packed, and RGB formats.
+// When a VideoFrame is backed by native textures, VideoPixelFormat describes
+// how those textures should be sampled and combined to produce the final
+// pixels.
+enum VideoPixelFormat {
+  PIXEL_FORMAT_UNKNOWN = 0,  // Unknown or unspecified format value.
+  PIXEL_FORMAT_I420 =
+      1,  // 12bpp YUV planar 1x1 Y, 2x2 UV samples, a.k.a. YU12.
+
+  // Note: Chrome does not actually support YVU compositing, so you probably
+  // don't actually want to use this. See http://crbug.com/784627.
+  PIXEL_FORMAT_YV12 = 2,  // 12bpp YVU planar 1x1 Y, 2x2 VU samples.
+
+  PIXEL_FORMAT_I422 = 3,   // 16bpp YUV planar 1x1 Y, 2x1 UV samples.
+  PIXEL_FORMAT_I420A = 4,  // 20bpp YUVA planar 1x1 Y, 2x2 UV, 1x1 A samples.
+  PIXEL_FORMAT_I444 = 5,   // 24bpp YUV planar, no subsampling.
+  PIXEL_FORMAT_NV12 =
+      6,  // 12bpp with Y plane followed by a 2x2 interleaved UV plane.
+  PIXEL_FORMAT_NV21 =
+      7,  // 12bpp with Y plane followed by a 2x2 interleaved VU plane.
+  /* PIXEL_FORMAT_UYVY = 8,  Deprecated */
+  PIXEL_FORMAT_YUY2 =
+      9,  // 16bpp interleaved 1x1 Y, 2x1 U, 1x1 Y, 2x1 V samples.
+  PIXEL_FORMAT_ARGB = 10,   // 32bpp BGRA (byte-order), 1 plane.
+  PIXEL_FORMAT_XRGB = 11,   // 24bpp BGRX (byte-order), 1 plane.
+  PIXEL_FORMAT_RGB24 = 12,  // 24bpp BGR (byte-order), 1 plane.
+
+  /* PIXEL_FORMAT_RGB32 = 13,  Deprecated */
+  PIXEL_FORMAT_MJPEG = 14,  // MJPEG compressed.
+  /* PIXEL_FORMAT_MT21 = 15,  Deprecated */
+
+  // The P* in the formats below designates the number of bits per pixel
+  // component. I.e. P9 is 9-bits per pixel component, P10 is 10-bits per pixel
+  // component, etc.
+  PIXEL_FORMAT_YUV420P9 = 16,
+  PIXEL_FORMAT_YUV420P10 = 17,
+  PIXEL_FORMAT_YUV422P9 = 18,
+  PIXEL_FORMAT_YUV422P10 = 19,
+  PIXEL_FORMAT_YUV444P9 = 20,
+  PIXEL_FORMAT_YUV444P10 = 21,
+  PIXEL_FORMAT_YUV420P12 = 22,
+  PIXEL_FORMAT_YUV422P12 = 23,
+  PIXEL_FORMAT_YUV444P12 = 24,
+
+  /* PIXEL_FORMAT_Y8 = 25, Deprecated */
+  PIXEL_FORMAT_Y16 = 26,  // single 16bpp plane.
+
+  PIXEL_FORMAT_ABGR = 27,  // 32bpp RGBA (byte-order), 1 plane.
+  PIXEL_FORMAT_XBGR = 28,  // 24bpp RGBX (byte-order), 1 plane.
+
+  PIXEL_FORMAT_P016LE = 29,  // 24bpp NV12, 16 bits per channel
+
+  PIXEL_FORMAT_XR30 =
+      30,  // 32bpp BGRX, 10 bits per channel, 2 bits ignored, 1 plane
+  PIXEL_FORMAT_XB30 =
+      31,  // 32bpp RGBX, 10 bits per channel, 2 bits ignored, 1 plane
+
+  PIXEL_FORMAT_BGRA = 32,  // 32bpp ARGB (byte-order), 1 plane.
+
+  // Please update UMA histogram enumeration when adding new formats here.
+  PIXEL_FORMAT_MAX =
+      PIXEL_FORMAT_BGRA,  // Must always be equal to largest entry logged.
+};
+
+// Returns the name of a Format as a string.
+std::string VideoPixelFormatToString(VideoPixelFormat format);
+
+// Returns human readable fourcc string.
+// If any of the four characters is non-printable, it outputs
+// "0x<32-bit integer in hex>", e.g. FourccToString(0x66616b00) returns
+// "0x66616b00".
+std::string FourccToString(uint32_t fourcc);
+
+// Returns the number of significant bits per channel.
+size_t BitDepth(VideoPixelFormat format);
+
+}  // namespace media
+
+#endif  // VIDEO_PIXEL_FORMAT_H_