Index: chrome/browser/render_widget_host.cc |
=================================================================== |
--- chrome/browser/render_widget_host.cc (revision 8043) |
+++ chrome/browser/render_widget_host.cc (working copy) |
@@ -434,6 +434,9 @@ |
void RenderWidgetHost::MovePluginWindows( |
const std::vector<WebPluginGeometry>& plugin_window_moves) { |
+ if (plugin_window_moves.empty()) |
+ return; |
+ |
HDWP defer_window_pos_info = |
::BeginDeferWindowPos(static_cast<int>(plugin_window_moves.size())); |
@@ -443,7 +446,10 @@ |
} |
for (size_t i = 0; i < plugin_window_moves.size(); ++i) { |
- unsigned long flags = 0; |
+ // Don't invalidate now because that would result in cross process calls |
+ // that make scrolling slow. Instead the window is invalidated |
+ // asynchronously by the plugin code. |
+ unsigned long flags = SWP_NOREDRAW; |
const WebPluginGeometry& move = plugin_window_moves[i]; |
if (move.visible) |