Fix for the flashing of the front tab....

chrome/browser/tabs/tab_strip_model.cc

Index: chrome/browser/tabs/tab_strip_model.cc
===================================================================
--- chrome/browser/tabs/tab_strip_model.cc	(revision 25038)
+++ chrome/browser/tabs/tab_strip_model.cc	(working copy)
@@ -398,8 +398,13 @@
   // layout is performed with sane view dimensions even when we're opening a
   // new background tab.
   if (TabContents* old_contents = GetSelectedTabContents()) {
-    if (!foreground)
+    if (!foreground) {
       contents->view()->SizeContents(old_contents->view()->GetContainerSize());
+      // We need to hide the contents or else we get and execute paints for
+      // background tabs. With enough background tabs they will steal the
+      // backing store of the visible tab causing flashing. See bug 20831.
+      contents->HideContents();

[darin (slow to review), 2009/09/04 06:25:57]

shouldn't we hide the contents before we size them?  SizeContents sends a resize
IPC to the renderer, which could kick off a paint.

why not create tabs hidden first?

+    }
   }
 }