Fix missing symbols for pre-linking of the Cast sender library for iOS.

media/base/video_frame.h

Index: media/base/video_frame.h
diff --git a/media/base/video_frame.h b/media/base/video_frame.h
index cebed0af11a47aea5537b92346d97cebae1ef05f..46132ad671826e5a72422a9c9b15a26e4e1ef0dd 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -195,6 +195,7 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
   // Creates a frame which indicates end-of-stream.
   static scoped_refptr<VideoFrame> CreateEOSFrame();
 
+#if !defined(MEDIA_FOR_CAST_IOS)
   // Allocates YV12 frame based on |size|, and sets its data to the YUV(y,u,v).
   static scoped_refptr<VideoFrame> CreateColorFrame(
       const gfx::Size& size,
@@ -209,6 +210,7 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> {
   // equivalent of RGBA(0,0,0,0).
   static scoped_refptr<VideoFrame> CreateTransparentFrame(
       const gfx::Size& size);
+#endif  // defined(MEDIA_FOR_CAST_IOS)
 
 #if defined(VIDEO_HOLE)
   // Allocates a hole frame.