media: Change auto to not deduce raw pointers.

media/cast/sender/h264_vt_encoder_unittest.cc

Index: media/cast/sender/h264_vt_encoder_unittest.cc
diff --git a/media/cast/sender/h264_vt_encoder_unittest.cc b/media/cast/sender/h264_vt_encoder_unittest.cc
index efe4adedceda992c1b2aec157395e64bea25160f..90ee21f4dc37356557f85b2cce1d3f1369b84a8e 100644
--- a/media/cast/sender/h264_vt_encoder_unittest.cc
+++ b/media/cast/sender/h264_vt_encoder_unittest.cc
@@ -177,10 +177,10 @@ void CreateFrameAndMemsetPlane(VideoFrameFactory* const video_frame_factory) {
       video_frame_factory->MaybeCreateFrame(
           gfx::Size(kVideoWidth, kVideoHeight), base::TimeDelta());
   ASSERT_TRUE(video_frame.get());
-  auto cv_pixel_buffer = video_frame->cv_pixel_buffer();
+  auto* cv_pixel_buffer = video_frame->cv_pixel_buffer();
   ASSERT_TRUE(cv_pixel_buffer);
   CVPixelBufferLockBaseAddress(cv_pixel_buffer, 0);
-  auto ptr = CVPixelBufferGetBaseAddressOfPlane(cv_pixel_buffer, 0);
+  auto* ptr = CVPixelBufferGetBaseAddressOfPlane(cv_pixel_buffer, 0);
   ASSERT_TRUE(ptr);
   memset(ptr, 0xfe, CVPixelBufferGetBytesPerRowOfPlane(cv_pixel_buffer, 0) *
                         CVPixelBufferGetHeightOfPlane(cv_pixel_buffer, 0));