Revert "[libvpx] Use HighBD config for ARM64 Mac"

This reverts commit 22e4c40d.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 810904 as the
culprit for failures in the build cycles as shown on:
https://analysis.chromium.org/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtLzIyZTRjNDBkNWE1NmU4Njg1MDk1MmFlZDNiMDdhZGE3YzNlYzczNzQM

Sample Failed Build: https://ci.chromium.org/b/8868133565492231744

Sample Failed Step: compile

Original change's description:
> [libvpx] Use HighBD config for ARM64 Mac
> 
> Also adds unit tests to cover HighBD support on various platforms.
> 
> Bug: 1128445
> Change-Id: I9951a49f0fca311f48ff55c1618f3d18343dfca8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427556
> Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
> Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
> Reviewed-by: James Zern <jzern@google.com>
> Cr-Commit-Position: refs/heads/master@{#810904}


Change-Id: I8182741ee91739c9ff313adf35ad9ab8044e081a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1128445
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2432878
Cr-Commit-Position: refs/heads/master@{#810920}

media/base/supported_types_unittest.cc

@@ -156,28 +156,6 @@ TEST(SupportedTypesTest, IsSupportedVideoType_VP9Matrix) {
   EXPECT_EQ(kSupportedMatrix.size(), num_found);
 }
 
-TEST(SupportedTypesTest, IsSupportedVideoType_VP9Profiles) {
-  // Default to common 709.
-  const VideoColorSpace kColorSpace = VideoColorSpace::REC709();
-
-  // Some codecs do not have a notion of level.
-  const int kUnspecifiedLevel = 0;
-
-  EXPECT_TRUE(IsSupportedVideoType(
-      {kCodecVP9, VP9PROFILE_PROFILE0, kUnspecifiedLevel, kColorSpace}));
-  EXPECT_TRUE(IsSupportedVideoType(
-      {kCodecVP9, VP9PROFILE_PROFILE1, kUnspecifiedLevel, kColorSpace}));
-
-// VP9 Profile2 are supported on x86, ChromeOS on ARM and Mac/Win on ARM64.
-// See third_party/libvpx/BUILD.gn.
-#if defined(ARCH_CPU_X86_FAMILY) ||                           \
-    (defined(ARCH_CPU_ARM_FAMILY) && defined(OS_CHROMEOS)) || \
-    (defined(ARCH_CPU_ARM64) && (defined(OS_MAC) || defined(OS_WIN)))
-  EXPECT_TRUE(IsSupportedVideoType(
-      {kCodecVP9, VP9PROFILE_PROFILE2, kUnspecifiedLevel, kColorSpace}));
-#endif
-}
-
 TEST(SupportedTypesTest, IsSupportedAudioTypeWithSpatialRenderingBasics) {
   const bool is_spatial_rendering = true;
   // Dolby Atmos = E-AC3 (Dolby Digital Plus) + spatialRendering. Currently not

third_party/libvpx/BUILD.gn

@@ -331,7 +331,7 @@ static_library("libvpx") {
       sources = libvpx_srcs_arm
     }
   } else if (current_cpu == "arm64") {
-    if (is_chromeos || is_win || is_mac) {
+    if (is_chromeos || is_win) {
       sources = libvpx_srcs_arm64_highbd
     } else {
       sources = libvpx_srcs_arm64

third_party/libvpx/generate_gni.sh

@@ -490,7 +490,7 @@ if [ -z $ONLY_CONFIGS ]; then
   make libvpx_srcs.txt target=libs $config > /dev/null
   convert_srcs_to_project_files libvpx_srcs.txt libvpx_srcs_arm64_highbd
 
-  echo "ARM64 Windows and Mac use the ARM64 Linux HighBD source list. No need to generate it."
+  echo "ARM64 Windows uses the ARM64 Linux HighBD source list. No need to generate it."
 
   echo "Generate MIPS source list."
   config=$(print_config_basic linux/mipsel)