Remove the media switch of MediaFoundationH264Encoding.

The existing media foundation encoding path has been enabled by
default for a long time. Remove the old switch in preparation for
a new one which controls usage of the asynchronous MFT.

Bug: 982799
Change-Id: I9456029bf38f5af3710b93d693876f20e69d2768
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2135313Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756363}

AUTHORS

@@ -191,6 +191,7 @@ Chris Tserng <tserng@amazon.com>
 Chris Vasselli <clindsay@gmail.com>
 Christophe Dumez <ch.dumez@samsung.com>
 Christopher Dale <chrelad@gmail.com>
+Chunbo Hua <chunbo.hua@intel.com>
 Claudio DeSouza <claudiomdsjr@gmail.com>
 Clemens Fruhwirth <clemens@endorphin.org>
 Clement Scheelfeldt Skau <clementskau@gmail.com>

media/base/media_switches.cc

@@ -565,10 +565,6 @@ const base::Feature kUsePooledSharedImageVideoProvider{
 const base::Feature kDelayCopyNV12Textures{"DelayCopyNV12Textures",
                                            base::FEATURE_ENABLED_BY_DEFAULT};
 
-// Enables H264 HW encode acceleration using Media Foundation for Windows.
-const base::Feature kMediaFoundationH264Encoding{
-    "MediaFoundationH264Encoding", base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Enables MediaFoundation based video capture
 const base::Feature kMediaFoundationVideoCapture{
     "MediaFoundationVideoCapture", base::FEATURE_ENABLED_BY_DEFAULT};

media/base/media_switches.h

@@ -195,7 +195,6 @@ MEDIA_EXPORT extern const base::Feature kUsePooledSharedImageVideoProvider;
 
 #if defined(OS_WIN)
 MEDIA_EXPORT extern const base::Feature kDelayCopyNV12Textures;
-MEDIA_EXPORT extern const base::Feature kMediaFoundationH264Encoding;
 MEDIA_EXPORT extern const base::Feature kMediaFoundationVideoCapture;
 MEDIA_EXPORT extern const base::Feature kMediaFoundationVP8Decoding;
 MEDIA_EXPORT extern const base::Feature kDirectShowGetPhotoState;

media/gpu/gpu_video_encode_accelerator_factory.cc

@@ -100,11 +100,9 @@ std::vector<VEAFactoryFunction> GetVEAFactoryFunctions(
   vea_factory_functions.push_back(base::BindRepeating(&CreateVTVEA));
 #endif
 #if defined(OS_WIN)
-  if (base::FeatureList::IsEnabled(kMediaFoundationH264Encoding)) {
-    vea_factory_functions.push_back(base::BindRepeating(
-        &CreateMediaFoundationVEA,
-        gpu_preferences.enable_media_foundation_vea_on_windows7));
-  }
+  vea_factory_functions.push_back(base::BindRepeating(
+      &CreateMediaFoundationVEA,
+      gpu_preferences.enable_media_foundation_vea_on_windows7));
 #endif
   return vea_factory_functions;
 }