Fix Sunspider performance regression

content/browser/browser_plugin/browser_plugin_embedder.cc

Index: content/browser/browser_plugin/browser_plugin_embedder.cc
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.cc b/content/browser/browser_plugin/browser_plugin_embedder.cc
index 130fe5b503a5cc6a90df1db4c69f5b0e02aa84eb..97e6cc43aa7560c3ee3aa6090521c0a5a1c8cd93 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.cc
+++ b/content/browser/browser_plugin/browser_plugin_embedder.cc
@@ -136,6 +136,9 @@ void BrowserPluginEmbedder::CreateGuest(
   *guest_renderer_prefs = *web_contents()->GetMutableRendererPrefs();
 
   guest_renderer_prefs->throttle_input_events = false;
+  // We would like the guest to report changes to frame names so that we can
+  // update the BrowserPlugin's corresponding 'name' attribute.

[Charlie Reis, 2013/01/09 22:35:06]

Please add a TODO with a bug number to remove this.  This isn't a long-term fix,
because it slows down SunSpider-like workloads (whether this many name changes
is realistic in practice or not) within the webview tag, and it means we can't
keep track of window names in normal pages.

[Fady Samuel, 2013/01/09 22:40:57]

Done.

+  guest_renderer_prefs->report_frame_name_changes = true;
   // Navigation is disabled in Chrome Apps. We want to make sure guest-initiated
   // navigations still continue to function inside the app.
   guest_renderer_prefs->browser_handles_all_top_level_requests = false;