[DevTools] Unpause renderer when paused RenderFrame is closed.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 161a2e8276c67108e9a50159685b4541fd29863d..17c6ceda2fa2ef711933afde3640abce669c3fe4 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3788,6 +3788,10 @@ void RenderFrameImpl::WasShown() {
   FOR_EACH_OBSERVER(RenderFrameObserver, observers_, WasShown());
 }
 
+void RenderFrameImpl::WidgetWillClose() {
+  FOR_EACH_OBSERVER(RenderFrameObserver, observers_, WidgetWillClose());
+}
+
 bool RenderFrameImpl::IsHidden() {
   return GetRenderWidget()->is_hidden();
 }