Rename functions in video frame to comply with Style Guide

media/base/mac/video_frame_mac.cc

Index: media/base/mac/video_frame_mac.cc
diff --git a/media/base/mac/video_frame_mac.cc b/media/base/mac/video_frame_mac.cc
index 2f06aabbbaac85c0c5d1b5d90ac77ae93c79f21b..e299bf2fadb3f77dae937898884cbd8f4f45d7be 100644
--- a/media/base/mac/video_frame_mac.cc
+++ b/media/base/mac/video_frame_mac.cc
@@ -35,8 +35,8 @@ WrapVideoFrameInCVPixelBuffer(const VideoFrame& frame) {
   base::ScopedCFTypeRef<CVPixelBufferRef> pixel_buffer;
 
   // If the frame is backed by a pixel buffer, just return that buffer.
-  if (frame.cv_pixel_buffer()) {
-    pixel_buffer.reset(frame.cv_pixel_buffer(), base::scoped_policy::RETAIN);
+  if (frame.CvPixelBuffer()) {
+    pixel_buffer.reset(frame.CvPixelBuffer(), base::scoped_policy::RETAIN);
     return pixel_buffer;
   }