[ios-blink] Enable CONFIG_VP9_HIGHBITDEPTH for iOS Blink

- Enabled CONFIG_VP9_HIGHBITDEPTH in third_party/libvpx/BUILD.gn by
  including is_ios in the relevant conditionals.
- Removed VP9 high bit depth test filters from
  testing/buildbot/filters/ios.content_browsertests.filter:
    - Default/MediaTest.VideoBearHighBitDepthVP9/0
    - Default/MediaTest.VideoBearHighBitDepthVP9/1
- Verified VP9 HDR playback using YouTube YTS certification tests[1]
  and all relevant tests are passing successfully.

[1] https://yts.devicecertification.youtube/2021/?tests=41-72&test_type=formatsupport-test#1745316763281

Bug: 1449877, 391914246
Change-Id: Idca4f52ca0b7edc39fb312176b60e896360abfe6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4790543
Reviewed-by: Ian Vollick <vollick@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Abhijeet Kandalkar <abhijeet@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1450049}

content/browser/media/media_canplaytype_browsertest.cc

@@ -164,7 +164,7 @@ IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_Mpeg2Ts) {
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_NewVp9Variants) {
 // Profile 2 and 3 support is currently disabled on Android prior to P and MIPS.
 #if (defined(ARCH_CPU_ARM_FAMILY) && !BUILDFLAG(IS_WIN) && \
-     !BUILDFLAG(IS_MAC)) ||                                \
+     !BUILDFLAG(IS_APPLE)) ||                              \
     defined(ARCH_CPU_MIPS_FAMILY)
 #if BUILDFLAG(IS_ANDROID)
   if (base::android::BuildInfo::GetInstance()->sdk_int() >=

testing/buildbot/filters/ios.content_browsertests.filter

@@ -54,8 +54,6 @@
 -DataDecoderBrowserTest.DecodeImage
 -DataDecoderBrowserTest.DecodeImageIsolated
 -Default/MediaTest.VideoBear12DepthVP9/0
--Default/MediaTest.VideoBearHighBitDepthVP9/0
--Default/MediaTest.VideoBearHighBitDepthVP9/1
 -DevToolsProtocolDeviceEmulationPrerenderTest.DeviceSize
 -DevToolsProtocolDeviceEmulationTest.DeviceSize
 -DohHttpsProtocolUpgradeBrowserTest.HttpsProtocolUpgrade
@@ -119,7 +117,6 @@
 -WebRtcGetUserMediaBrowserTest.TestGetUserMediaAspectRatio4To3
 
 # TODO(crbug.com/40276544): cannot create shared image.
--Default/MediaTest.LoadManyVideos/0
 -Default/MediaTest.VideoBearMp4/1
 -Default/MediaTest.VideoBearMp4Hevc10bit/1
 -Default/MediaTest.VideoBearMp4Hevc10bit422/1

third_party/libvpx/BUILD.gn

@@ -31,7 +31,7 @@ if (current_cpu == "x86") {
     cpu_arch_full = "arm"
   }
 } else if (current_cpu == "arm64") {
-  if (is_win || is_chromeos || is_mac) {
+  if (is_win || is_chromeos || is_mac || is_ios) {
     # This is necessary for CrOS and macOS as they reuse the Linux
     # configuration, of which there are two (see the later definition of
     # os_category).
@@ -560,7 +560,7 @@ static_library("libvpx") {
       public_deps = [ ":libvpx_arm_headers" ]
     }
   } else if (current_cpu == "arm64") {
-    if (is_chromeos || is_win || is_mac) {
+    if (is_chromeos || is_win || is_mac || is_ios) {
       sources = libvpx_srcs_arm64_highbd
       public_deps = [ ":libvpx_arm64_highbd_headers" ]
     } else {