Have RenderWidgetHostViewGtk take ownership of its widget.

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

Index: chrome/browser/renderer_host/render_widget_host_view_gtk.cc
diff --git a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
index 794d5ae46da50505c0c7f365c440841bfacc5847..ad9ffdf95acec1c94edcf7b5550356e10a62cbc2 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
+++ b/chrome/browser/renderer_host/render_widget_host_view_gtk.cc
@@ -136,6 +136,11 @@ RenderWidgetHostViewGtk::RenderWidgetHostViewGtk(RenderWidgetHost* widget_host)
     : host_(widget_host) {
   host_->set_view(this);
   view_ = RenderWidgetHostViewGtkWidget::CreateNewWidget(this);
+  // BUG 8707: We will live in some container (in this case in WebContents).
+  // We want to destroy during Destroy(), independent of how we are managed in
+  // any containers.  We need to sink the reference here to "own" the widget so
+  // it can be added and removed from containers without being destroyed.
+  g_object_ref_sink(view_);
 }
 
 RenderWidgetHostViewGtk::~RenderWidgetHostViewGtk() {