Revert of Delete cricket::VideoFrame methods GetYPlane and GetYPitch.

talk/app/webrtc/objc/public/RTCI420Frame.h

 /*
  * libjingle
  * Copyright 2013 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 10 matching lines @@
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #import <Foundation/Foundation.h>
 
 // RTCI420Frame is an ObjectiveC version of cricket::VideoFrame.
-// TODO(nisse): It appears it doesn't support any VideoFrame methods,
-// so let it wrap an webrtc::VideoFrameBuffer instead?
 @interface RTCI420Frame : NSObject
 
 @property(nonatomic, readonly) NSUInteger width;
 @property(nonatomic, readonly) NSUInteger height;
 @property(nonatomic, readonly) NSUInteger chromaWidth;
 @property(nonatomic, readonly) NSUInteger chromaHeight;
 // These can return NULL if the object is not backed by a buffer.
 @property(nonatomic, readonly) const uint8_t* yPlane;
 @property(nonatomic, readonly) const uint8_t* uPlane;
 @property(nonatomic, readonly) const uint8_t* vPlane;
 @property(nonatomic, readonly) NSInteger yPitch;
 @property(nonatomic, readonly) NSInteger uPitch;
 @property(nonatomic, readonly) NSInteger vPitch;
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 // Disallow init and don't add to documentation
 - (id)init __attribute__((
     unavailable("init is not a supported initializer for this class.")));
 #endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
 @end