Bug 1762025 - Block GPU process on Android versions 12 and above. r=gfx-reviewers,aosmond

On Android version 12, it appears as if the EGL context does not
correctly get detached from a Surface when its process dies. This
means that subsequent attempts to create an EGL context fail, meaning
we cannot render anything.

This results in a completely unusable browser following a GPU process
crash, which is worse than the alternative of a parent process crash.

Block the GPU process on Android 12 and above until we have found a
workaround.

Differential Revision: https://phabricator.services.mozilla.com/D142452

widget/android/GfxInfo.cpp

@@ -697,6 +697,20 @@ nsresult GfxInfo::GetFeatureStatusImpl(
     return NS_OK;
   }
 
+  if (aFeature == FEATURE_GPU_PROCESS) {
+    // On Android 12 the EGL context isn't correctly detached from the Surface
+    // when the process dies, meaning we are subsequently unable to create new
+    // EGL contexts. Block the GPU process on Android 12 and above until we find
+    // a solution. See bug 1762025.
+    if (mSDKVersion >= 31) {
+      *aStatus = nsIGfxInfo::FEATURE_BLOCKED_OS_VERSION;
+      aFailureId = "FEATURE_FAILURE_ANDROID_12";
+    } else {
+      *aStatus = nsIGfxInfo::FEATURE_STATUS_OK;
+    }
+    return NS_OK;
+  }
+
   return GfxInfoBase::GetFeatureStatusImpl(
       aFeature, aStatus, aSuggestedDriverVersion, aDriverInfo, aFailureId, &os);
 }