Defer window destruction until GPU finished drawing.

chrome/browser/gpu_process_host.cc

Index: chrome/browser/gpu_process_host.cc
diff --git a/chrome/browser/gpu_process_host.cc b/chrome/browser/gpu_process_host.cc
index c321f9720c27c5b72822dfb86e326176b1c94449..eeb50bda6ba08ad2e4dcec4fcf0bc6ab4d642974 100644
--- a/chrome/browser/gpu_process_host.cc
+++ b/chrome/browser/gpu_process_host.cc
@@ -171,6 +171,7 @@ void GpuProcessHost::OnControlMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(GpuHostMsg_SynchronizeReply, OnSynchronizeReply)
 #if defined(OS_LINUX)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuHostMsg_GetViewXID, OnGetViewXID)
+    IPC_MESSAGE_HANDLER(GpuHostMsg_ReleaseXID, OnReleaseXID)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(GpuHostMsg_ResizeXID, OnResizeXID)
 #elif defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(GpuHostMsg_AcceleratedSurfaceSetIOSurface,
@@ -228,6 +229,11 @@ void GetViewXIDDispatcher(gfx::NativeViewId id, IPC::Message* reply_msg) {
       NewRunnableFunction(&SendDelayedReply, reply_msg));
 }
 
+void ReleaseXIDDispatcher(unsigned long xid) {
+  GtkNativeViewManager* manager = Singleton<GtkNativeViewManager>::get();
+  manager->ReleasePermanentXID(xid);
+}
+
 void ResizeXIDDispatcher(unsigned long xid, gfx::Size size,
     IPC::Message *reply_msg) {
   GdkWindow* window = reinterpret_cast<GdkWindow*>(gdk_xid_table_lookup(xid));
@@ -255,6 +261,13 @@ void GpuProcessHost::OnGetViewXID(gfx::NativeViewId id,
       NewRunnableFunction(&GetViewXIDDispatcher, id, reply_msg));
 }
 
+void GpuProcessHost::OnReleaseXID(unsigned long xid) {
+  // Have to release a permanent XID from UI thread.
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableFunction(&ReleaseXIDDispatcher, xid));
+}
+
 void GpuProcessHost::OnResizeXID(unsigned long xid, gfx::Size size,
                                  IPC::Message *reply_msg) {
   // Have to resize the window from UI thread.