media/gpu/chromeos: Fix V4L2PixFmtToV4L2PixFmt test on v5.2+ kernels

V4L2PixFmtIsEqual seems to have been renamed to CheckFromV4L2PixFmtAndBack
during development, as there is no trace of the former in tree. But tests
for two newer pixel formats were not converted. This was found while
building media_unittests for ARM desktop Linux with use_v4l2_codec=1 with
the current sysroot.

Convert the remaining ones so the test builds correctly.

R=acourbot@chromium.org

Test: Build media_unittests with use_v4l2_codec=1 and v5.2+ kernels
Bug: None
Change-Id: Ic7743af5089795c0a9a821ef01de90b5a1e05f75
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2232102Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#777258}

media/gpu/chromeos/fourcc_unittests.cc

@@ -32,11 +32,11 @@ TEST(FourccTest, V4L2PixFmtToV4L2PixFmt) {
 
   CheckFromV4L2PixFmtAndBack(V4L2_PIX_FMT_ABGR32);
 #ifdef V4L2_PIX_FMT_RGBA32
-  V4L2PixFmtIsEqual(V4L2_PIX_FMT_RGBA32);
+  CheckFromV4L2PixFmtAndBack(V4L2_PIX_FMT_RGBA32);
 #endif
   CheckFromV4L2PixFmtAndBack(V4L2_PIX_FMT_XBGR32);
 #ifdef V4L2_PIX_FMT_RGBX32
-  V4L2PixFmtIsEqual(V4L2_PIX_FMT_RGBX32);
+  CheckFromV4L2PixFmtAndBack(V4L2_PIX_FMT_RGBX32);
 #endif
   CheckFromV4L2PixFmtAndBack(V4L2_PIX_FMT_RGB32);
   CheckFromV4L2PixFmtAndBack(V4L2_PIX_FMT_YUV420);