Bug 1138181 - Be more aggressive in updating plugin geometry in the compositor, avoids filtering out important offset updates that don't involve remote layer tree updates. r=roc

gfx/layers/ipc/CompositorParent.cpp

@@ -1818,8 +1818,7 @@ UpdatePluginWindowState(uint64_t aId)
   }
 
   bool shouldComposePlugin = !!lts.mRoot &&
-                             !!lts.mRoot->GetParent() &&
-                             lts.mUpdatedPluginDataAvailable;
+                             !!lts.mRoot->GetParent();
 
   bool shouldHidePlugin = (!lts.mRoot ||
                            !lts.mRoot->GetParent()) &&
@@ -1832,6 +1831,7 @@ UpdatePluginWindowState(uint64_t aId)
       // calculating clipping.
       nsTArray<uintptr_t> aVisibleIdList;
       unused << lts.mParent->SendUpdatePluginVisibility(aVisibleIdList);
+      lts.mUpdatedPluginDataAvailable = false;
       return;
     }