[DevTools] Add notifyPopupOpeningObservers call before running debug loop

third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp

Index: third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp b/third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp
index 122af3f279a37ac9eb57604f1b5e876c577e90a5..b1e118df8faab4ecb8d1bd04e6f3771d95c7a84f 100644
--- a/third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp
+++ b/third_party/WebKit/Source/web/WebDevToolsAgentImpl.cpp
@@ -196,6 +196,8 @@ private:
             m_frozenViews.add(view);
             views.append(view);
             view->setIgnoreInputEvents(true);
+            if (Page* page = view->page())
+                page->chromeClient().willEnterDebugLoop();
         }
 
         const WebFrameWidgetsSet& widgetImpls = WebFrameWidgetImpl::allInstances();
@@ -205,6 +207,8 @@ private:
             m_frozenWidgets.add(widget);
             widgets.append(widget);
             widget->setIgnoreInputEvents(true);
+            if (Page* page = widget->page())
+                page->chromeClient().willEnterDebugLoop();
         }
 
         // 2. Notify embedder about pausing.