Make sure bubbles in Views default to close before their RenderFrameHosts.

chrome/browser/ui/extensions/extension_installed_bubble.cc

Index: chrome/browser/ui/extensions/extension_installed_bubble.cc
diff --git a/chrome/browser/ui/extensions/extension_installed_bubble.cc b/chrome/browser/ui/extensions/extension_installed_bubble.cc
index 74d65aa7642a6abe7fa71f2fd62953c7d24a84cf..2db22acb480bf44ee01312e5a21f82b1e6808fa8 100644
--- a/chrome/browser/ui/extensions/extension_installed_bubble.cc
+++ b/chrome/browser/ui/extensions/extension_installed_bubble.cc
@@ -212,6 +212,10 @@ std::string ExtensionInstalledBubble::GetName() const {
   return "ExtensionInstalled";
 }
 
+const content::RenderFrameHost* ExtensionInstalledBubble::OwningFrame() const {
+  return nullptr;

[Peter Kasting, 2016/02/06 04:13:08]

I don't know anything about this bubble, so I just want to make sure that
returning null here is safe.

[hcarmona, 2016/02/09 00:31:05]

I worked on this bubble. Returning null is fine here because this bubble
isn't related to anything in the render view.

+}
+
 base::string16 ExtensionInstalledBubble::GetHowToUseDescription() const {
   int message_id = 0;
   base::string16 extra;