Add WebCodecs API UseCounter

WebCodec already has UseCounters on its different subcomponents. Origin
trial infrastructure cannot aggregate UseCounters. This CL adds a
global counter that tracks anytime WebCodecs is used, to allow running
an origin trial.

Bug: 1123170
Change-Id: Ic8c816d99af16c78a50ebc16d693362368a7483b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2382408
Commit-Queue: Thomas Guilbert <tguilbert@chromium.org>
Auto-Submit: Thomas Guilbert <tguilbert@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802859}

third_party/blink/public/mojom/web_feature/web_feature.mojom

@@ -2789,6 +2789,7 @@ enum WebFeature {
   kBackForwardCacheExperimentHTTPHeader = 3461,
   kV8Navigator_OpenTCPSocket_Method = 3462,
   kV8Navigator_OpenUDPSocket_Method = 3463,
+  kWebCodecs = 3464,
 
   // Add new features immediately above this line. Don't change assigned
   // numbers of any item, and don't reuse removed slots.

third_party/blink/renderer/modules/webcodecs/audio_decoder.cc

@@ -13,11 +13,13 @@
 #include "media/base/mime_util.h"
 #include "media/base/supported_types.h"
 #include "media/base/waiting.h"
+#include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_audio_decoder_init.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_encoded_audio_chunk.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_encoded_audio_config.h"
 #include "third_party/blink/renderer/modules/webcodecs/audio_decoder_broker.h"
 #include "third_party/blink/renderer/modules/webcodecs/codec_config_eval.h"
+#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
 
 #include <memory>
 #include <vector>
@@ -58,6 +60,8 @@ AudioDecoder::AudioDecoder(ScriptState* script_state,
                            const AudioDecoderInit* init,
                            ExceptionState& exception_state)
     : DecoderTemplate<AudioDecoderTraits>(script_state, init, exception_state) {
+  UseCounter::Count(ExecutionContext::From(script_state),
+                    WebFeature::kWebCodecs);
 }
 
 CodecConfigEval AudioDecoder::MakeMediaConfig(const ConfigType& config,

third_party/blink/renderer/modules/webcodecs/image_decoder_external.cc

@@ -9,6 +9,7 @@
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "third_party/blink/public/common/mime_util/mime_util.h"
+#include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
 #include "third_party/blink/renderer/bindings/core/v8/v8_image_bitmap_options.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_image_decoder_init.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_image_frame.h"
@@ -23,6 +24,7 @@
 #include "third_party/blink/renderer/platform/graphics/unaccelerated_static_bitmap_image.h"
 #include "third_party/blink/renderer/platform/image-decoders/image_decoder.h"
 #include "third_party/blink/renderer/platform/image-decoders/segment_reader.h"
+#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
 
 namespace blink {
 
@@ -59,6 +61,9 @@ ImageDecoderExternal::ImageDecoderExternal(ScriptState* script_state,
                                            const ImageDecoderInit* init,
                                            ExceptionState& exception_state)
     : script_state_(script_state) {
+  UseCounter::Count(ExecutionContext::From(script_state),
+                    WebFeature::kWebCodecs);
+
   // |data| is a required field.
   DCHECK(init->hasData());
   DCHECK(!init->data().IsNull());

third_party/blink/renderer/modules/webcodecs/video_decoder.cc

@@ -14,6 +14,7 @@
 #include "media/base/supported_types.h"
 #include "media/base/video_decoder.h"
 #include "media/media_buildflags.h"
+#include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
 #include "third_party/blink/public/platform/platform.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_encoded_video_chunk.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_video_decoder_config.h"
@@ -26,6 +27,7 @@
 #include "third_party/blink/renderer/platform/bindings/exception_state.h"
 #include "third_party/blink/renderer/platform/bindings/script_state.h"
 #include "third_party/blink/renderer/platform/heap/persistent.h"
+#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
 #include "third_party/blink/renderer/platform/wtf/functional.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
@@ -73,6 +75,8 @@ VideoDecoder::VideoDecoder(ScriptState* script_state,
                            const VideoDecoderInit* init,
                            ExceptionState& exception_state)
     : DecoderTemplate<VideoDecoderTraits>(script_state, init, exception_state) {
+  UseCounter::Count(ExecutionContext::From(script_state),
+                    WebFeature::kWebCodecs);
 }
 
 CodecConfigEval VideoDecoder::MakeMediaConfig(const ConfigType& config,

third_party/blink/renderer/modules/webcodecs/video_encoder.cc

@@ -20,6 +20,7 @@
 #include "media/base/async_destroy_video_encoder.h"
 #include "media/video/gpu_video_accelerator_factories.h"
 #include "media/video/video_encode_accelerator_adapter.h"
+#include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
 #include "third_party/blink/public/platform/platform.h"
 #include "third_party/blink/public/platform/task_type.h"
 #include "third_party/blink/renderer/bindings/core/v8/script_function.h"
@@ -37,6 +38,7 @@
 #include "third_party/blink/renderer/platform/bindings/enumeration_base.h"
 #include "third_party/blink/renderer/platform/bindings/exception_state.h"
 #include "third_party/blink/renderer/platform/bindings/script_state.h"
+#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
 #include "third_party/blink/renderer/platform/scheduler/public/thread.h"
 #include "third_party/libyuv/include/libyuv.h"
 
@@ -108,6 +110,9 @@ VideoEncoder::VideoEncoder(ScriptState* script_state,
                            const VideoEncoderInit* init,
                            ExceptionState& exception_state)
     : state_(V8CodecState::Enum::kUnconfigured), script_state_(script_state) {
+  UseCounter::Count(ExecutionContext::From(script_state),
+                    WebFeature::kWebCodecs);
+
   output_callback_ = init->output();
   if (init->hasError())
     error_callback_ = init->error();

third_party/blink/renderer/modules/webcodecs/video_track_reader.cc

@@ -6,11 +6,13 @@
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "media/base/video_frame.h"
+#include "third_party/blink/public/mojom/web_feature/web_feature.mojom-blink.h"
 #include "third_party/blink/renderer/core/execution_context/execution_context.h"
 #include "third_party/blink/renderer/modules/mediastream/media_stream_video_track.h"
 #include "third_party/blink/renderer/modules/webcodecs/video_frame.h"
 #include "third_party/blink/renderer/platform/bindings/exception_state.h"
 #include "third_party/blink/renderer/platform/bindings/script_state.h"
+#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
 #include "third_party/blink/renderer/platform/scheduler/public/post_cross_thread_task.h"
 #include "third_party/blink/renderer/platform/wtf/cross_thread_functional.h"
 
@@ -23,7 +25,10 @@ VideoTrackReader::VideoTrackReader(ScriptState* script_state,
       real_time_media_task_runner_(
           ExecutionContext::From(script_state)
               ->GetTaskRunner(TaskType::kInternalMediaRealTime)),
-      track_(track) {}
+      track_(track) {
+  UseCounter::Count(ExecutionContext::From(script_state),
+                    WebFeature::kWebCodecs);
+}
 
 void VideoTrackReader::start(V8VideoFrameOutputCallback* callback,
                              ExceptionState& exception_state) {

tools/metrics/histograms/enums.xml

@@ -29038,6 +29038,7 @@ Called by update_use_counter_feature_enum.py.-->
   <int value="3461" label="BackForwardCacheExperimentHTTPHeader"/>
   <int value="3462" label="V8Navigator_OpenTCPSocket_Method"/>
   <int value="3463" label="V8Navigator_OpenUDPSocket_Method"/>
+  <int value="3464" label="WebCodecs"/>
 </enum>
 
 <enum name="FeaturePolicyAllowlistType">