Bug 1352575 (part 5) - Remove PluginModuleParent::mIsStartingAsync. r=jimm.

This allows a bunch of other things to be removed too, including
PluginModuleParent::mSurrogateInstances,
PluginModuleChromeParent::sInstantiated, and NS_PLUGIN_INIT_PENDING.

The patch also removes the AsyncPluginInit crash annotation.

dom/plugins/ipc/PluginProcessParent.cpp

@@ -131,9 +131,9 @@ PluginProcessParent::Delete()
 }
 
 void
-PluginProcessParent::SetCallRunnableImmediately(bool aCallImmediately)
+PluginProcessParent::SetCallRunnableImmediately()
 {
-    mRunCompleteTaskImmediately = aCallImmediately;
+    mRunCompleteTaskImmediately = true;
 }
 
 /**