Mac: Attach Extension NSViews to the view hierarchy before creating renderers

chrome/browser/ui/cocoa/extensions/extension_view_mac.mm

Index: chrome/browser/ui/cocoa/extensions/extension_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/extensions/extension_view_mac.mm b/chrome/browser/ui/cocoa/extensions/extension_view_mac.mm
index 44d12b982311cad702c4f7a6c3ba3f5c0321979b..7b62cfc680e4c7fadc805fa5b67af7094eed13af 100644
--- a/chrome/browser/ui/cocoa/extensions/extension_view_mac.mm
+++ b/chrome/browser/ui/cocoa/extensions/extension_view_mac.mm
@@ -38,8 +38,9 @@ void ExtensionViewMac::WindowFrameChanged() {
     render_view_host()->GetView()->WindowFrameChanged();
 }
 
-void ExtensionViewMac::Init() {
-  CreateWidgetHostView();
+void ExtensionViewMac::CreateWidgetHostViewIn(gfx::NativeView superview) {
+  [superview addSubview:GetNativeView()];
+  extension_host_->CreateRenderViewSoon();
 }
 
 Browser* ExtensionViewMac::GetBrowser() {
@@ -89,10 +90,6 @@ content::RenderViewHost* ExtensionViewMac::render_view_host() const {
   return extension_host_->render_view_host();
 }
 
-void ExtensionViewMac::CreateWidgetHostView() {
-  extension_host_->CreateRenderViewSoon();
-}
-
 void ExtensionViewMac::ShowIfCompletelyLoaded() {
   // We wait to show the ExtensionView until it has loaded, and the view has
   // actually been created. These can happen in different orders.