add more color formats NV21 and YV12 in video capture (mainly from Android).

media/video/capture/video_capture_device.h

 // 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.
 //
 // VideoCaptureDevice is the abstract base class for realizing video capture
 // device support in Chromium. It provides the interface for OS dependent
 // implementations.
 // The class is created and functions are invoked on a thread owned by
 // VideoCaptureManager. Capturing is done on other threads depended on the OS
 // specific implementation.
@@ skipping 24 matching lines @@
 
   // Color formats from camera.
   enum Format {
     kColorUnknown,  // Color format not set.
     kI420,
     kYUY2,
     kUYVY,
     kRGB24,
     kARGB,
     kMJPEG,  // Currently only supported on Windows.
+    kNV21,
+    kYV12,
   };
 
   // Describes the format a camera capture video in.
   struct Capability {
     Capability()
         : width(0),
           height(0),
           frame_rate(0),
           color(kColorUnknown) {}
     int width;
@@ skipping 47 matching lines @@
   // state it was when created.
   virtual void DeAllocate() = 0;
 
   // Get the name of the capture device.
   virtual const Name& device_name() = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_