[webcodecs] Remove hard constrain on accelerated encoders

The constrain is not needed, as the method to detect supported hardware
encoder profiles is implemented.

Bug: 1119636
Change-Id: Ic3fe4f1ea319f9adc1391d6e0a2203c09264bbf3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2551624Reviewed-by: Eugene Zemtsov <eugene@chromium.org>
Commit-Queue: Eugene Zemtsov <eugene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830543}

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

@@ -271,20 +271,9 @@ bool VideoEncoder::VerifyCodecSupport(ParsedConfig* config,
                                       ExceptionState& exception_state) {
   switch (config->codec) {
     case media::kCodecVP8:
-      if (config->acc_pref == AccelerationPreference::kRequire) {
-        exception_state.ThrowDOMException(DOMExceptionCode::kNotSupportedError,
-                                          "Accelerated vp8 is not supported");
-        return false;
-      }
       break;
 
     case media::kCodecVP9:
-      if (config->acc_pref == AccelerationPreference::kRequire) {
-        exception_state.ThrowDOMException(DOMExceptionCode::kNotSupportedError,
-                                          "Accelerated vp9 is not supported");
-        return false;
-      }
-
       // TODO(https://crbug.com/1119636): Implement / call a proper method for
       // detecting support of encoder configs.
       if (config->profile == media::VideoCodecProfile::VP9PROFILE_PROFILE1 ||