[Fuchsia] Enable Vulkan in runners.

Vulkan-related leaks have been fixed, so it's safe to re-enable it now.

This reverts commit 38dc3a47.

Bug: 1001296
Change-Id: If21c1562b5ba3e6a25ab41431d5144fad2375edf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1790418
Auto-Submit: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694953}

fuchsia/runners/cast/main.cc

@@ -16,7 +16,9 @@ int main(int argc, char** argv) {
 
   constexpr fuchsia::web::ContextFeatureFlags kCastRunnerFeatures =
       fuchsia::web::ContextFeatureFlags::NETWORK |
-      fuchsia::web::ContextFeatureFlags::AUDIO;
+      fuchsia::web::ContextFeatureFlags::AUDIO |
+      fuchsia::web::ContextFeatureFlags::VULKAN |
+      fuchsia::web::ContextFeatureFlags::HARDWARE_VIDEO_DECODER;
 
   CastRunner runner(
       base::fuchsia::ComponentContextForCurrentProcess()->outgoing().get(),

fuchsia/runners/web/main.cc

@@ -16,7 +16,9 @@ int main(int argc, char** argv) {
 
   constexpr fuchsia::web::ContextFeatureFlags kWebRunnerFeatures =
       fuchsia::web::ContextFeatureFlags::NETWORK |
-      fuchsia::web::ContextFeatureFlags::AUDIO;
+      fuchsia::web::ContextFeatureFlags::AUDIO |
+      fuchsia::web::ContextFeatureFlags::VULKAN |
+      fuchsia::web::ContextFeatureFlags::HARDWARE_VIDEO_DECODER;
 
   WebContentRunner runner(
       base::fuchsia::ComponentContextForCurrentProcess()->outgoing().get(),