Bug 1550422 - P6. Release object early when error. r=mattwoodrow

No need to keep the object alive.

Differential Revision: https://phabricator.services.mozilla.com/D31014

--HG--
extra : moz-landing-system : lando

dom/media/ipc/RDDProcessHost.cpp

@@ -67,6 +67,7 @@ bool RDDProcessHost::Launch(StringVector aExtraOpts) {
 
   if (!GeckoChildProcessHost::AsyncLaunch(aExtraOpts)) {
     mLaunchPhase = LaunchPhase::Complete;
+    mPrefSerializer = nullptr;
     return false;
   }
   return true;

gfx/ipc/GPUProcessHost.cpp

@@ -51,6 +51,7 @@ bool GPUProcessHost::Launch(StringVector aExtraOpts) {
 
   if (!GeckoChildProcessHost::AsyncLaunch(aExtraOpts)) {
     mLaunchPhase = LaunchPhase::Complete;
+    mPrefSerializer = nullptr;
     return false;
   }
   return true;