WebXR: Limit camera access feature availability

Allow camera access feature to be available only to devices with the
WebXRIncubations feature flag and with support for buffers.

Fixed: 1101140
Change-Id: I44a15f8ad53e2fff425618f58d74f4ccfaac998d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2300365
Commit-Queue: Luis Garcia <luisggarcia@google.com>
Reviewed-by: Klaus Weidner <klausw@chromium.org>
Reviewed-by: Piotr Bialecki <bialpio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790224}

content/browser/xr/service/browser_xr_runtime_impl.cc

@@ -8,6 +8,10 @@
 #include <memory>
 #include <utility>
 
+#if defined(OS_ANDROID)
+#include "base/android/android_hardware_buffer_compat.h"
+#endif
+
 #include "base/bind_helpers.h"
 #include "base/numerics/ranges.h"
 #include "build/build_config.h"
@@ -163,7 +167,6 @@ constexpr device::mojom::XRSessionFeature kARCoreDeviceFeatures[] = {
     device::mojom::XRSessionFeature::DOM_OVERLAY,
     device::mojom::XRSessionFeature::LIGHT_ESTIMATION,
     device::mojom::XRSessionFeature::ANCHORS,
-    device::mojom::XRSessionFeature::CAMERA_ACCESS,
 };
 
 #if BUILDFLAG(ENABLE_OPENVR)
@@ -266,6 +269,15 @@ bool BrowserXRRuntimeImpl::SupportsFeature(
         return base::FeatureList::IsEnabled(features::kWebXrHitTest);
       }
 
+#if defined(OS_ANDROID)
+      // Only support camera access if the feature flag is enabled & the device
+      // supports shared buffers.
+      if (feature == device::mojom::XRSessionFeature::CAMERA_ACCESS) {
+        return base::FeatureList::IsEnabled(features::kWebXrIncubations) &&
+               base::AndroidHardwareBufferCompat::IsSupportAvailable();
+      }
+#endif
+
       return ContainsFeature(kARCoreDeviceFeatures, feature);
     case device::mojom::XRDeviceId::ORIENTATION_DEVICE_ID:
       return ContainsFeature(kOrientationDeviceFeatures, feature);