try to sync with UXP to solve crash in msctfime.

dom/plugins/base/nsPluginNativeWindowWin.cpp

@@ -129,7 +129,9 @@ public:
   nsPluginHost::SpecialType mPluginType;
 };
 
+static bool sInMessageDispatch = false;
 static bool sInPreviousMessageDispatch = false;
+static UINT sLastMsg = 0;
 
 static bool ProcessFlashMessageDelayed(nsPluginNativeWindowWin * aWin, nsNPAPIPluginInstance * aInst,
                                          HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
@@ -199,6 +201,16 @@ static LRESULT CALLBACK PluginWndProcInternal(HWND hWnd, UINT msg, WPARAM wParam
   RefPtr<nsNPAPIPluginInstance> inst;
   win->GetPluginInstance(inst);
 
+  // Real may go into a state where it recursivly dispatches the same event
+  // when subclassed. If this is Real, lets examine the event and drop it
+  // on the floor if we get into this recursive situation. See bug 192914.
+  if (win->mPluginType == nsPluginHost::eSpecialType_RealPlayer) {
+    if (sInMessageDispatch && msg == sLastMsg)
+      return true;
+    // Cache the last message sent
+    sLastMsg = msg;
+  }
+
   bool enablePopups = false;
 
   // Activate/deactivate mouse capture on the plugin widget
@@ -268,6 +280,10 @@ static LRESULT CALLBACK PluginWndProcInternal(HWND hWnd, UINT msg, WPARAM wParam
 
     case WM_SETFOCUS:
     case WM_KILLFOCUS: {
+      // RealPlayer can crash, don't process the message for those,
+      // see bug 328675.
+      if (win->mPluginType == nsPluginHost::eSpecialType_RealPlayer && msg == sLastMsg)
+        return TRUE;
       // Make sure setfocus and killfocus get through to the widget procedure
       // even if they are eaten by the plugin. Also make sure we aren't calling
       // recursively.
@@ -297,6 +313,7 @@ static LRESULT CALLBACK PluginWndProcInternal(HWND hWnd, UINT msg, WPARAM wParam
     }
   }
 
+  sInMessageDispatch = true;
   LRESULT res;
   WNDPROC proc = (WNDPROC)win->GetWindowProc();
   if (PluginWndProc == proc) {
@@ -306,6 +323,7 @@ static LRESULT CALLBACK PluginWndProcInternal(HWND hWnd, UINT msg, WPARAM wParam
   } else {
     res = CallWindowProc(proc, hWnd, msg, wParam, lParam);
   }
+  sInMessageDispatch = false;
 
   if (inst) {
     // Popups are enabled (were enabled before the call to