[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 88b26d2e20fc7dc1884a675f35c497d2481b4490..699866e3f59713c2897ba7acb1d0d2ea12acb637 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3789,6 +3789,10 @@ 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();
 }