Revert of Change the video color space default.

media/base/video_frame.h

 // Copyright (c) 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.
 
 #ifndef MEDIA_BASE_VIDEO_FRAME_H_
 #define MEDIA_BASE_VIDEO_FRAME_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 44 matching lines @@
     YV24 = 5,  // 24bpp YUV planar, no subsampling.
 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
     NV12 = 6,  // 12bpp with Y plane followed by a 2x2 interleaved UV plane.
 #endif
     ARGB = 7,  // 32bpp ARGB, 1 plane.
     XRGB = 8,  // 24bpp XRGB, 1 plane.
     // Please update UMA histogram enumeration when adding new formats here.
     FORMAT_MAX = XRGB,  // Must always be equal to largest entry logged.
   };
 
-  // Color space or color range used for the pixels.
+  // Color space or color range used for the pixels, in general this is left
+  // unspecified, meaning Rec601 (SD) is assumed.
   // Logged to UMA, so never reuse values. Leave gaps if necessary.
   enum ColorSpace {
     COLOR_SPACE_UNSPECIFIED = 0,  // In general this is Rec601.
     COLOR_SPACE_JPEG = 1,  // JPEG color range.
     COLOR_SPACE_HD_REC709 = 2,  // Rec709 "HD" color space.
-    COLOR_SPACE_SD_REC601 = 3,  // Rec601 "SD" color space.
-    COLOR_SPACE_MAX = COLOR_SPACE_SD_REC601,
+    COLOR_SPACE_MAX = COLOR_SPACE_HD_REC709,
   };
 
   // Defines the pixel storage type. Differentiates between directly accessible
   // |data_| and pixels that are only indirectly accessible and not via mappable
   // memory.
   // Note that VideoFrames of any StorageType can also have Texture backing,
   // with "classical" GPU Driver-only textures identified as STORAGE_OPAQUE.
   enum StorageType {
     STORAGE_UNKNOWN = 0,
     STORAGE_OPAQUE = 1,  // We don't know how VideoFrame's pixels are stored.
@@ skipping 429 matching lines @@
   uint32 release_sync_point_;
 
   VideoFrameMetadata metadata_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoFrame);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_FRAME_H_