Exit flash fullscreen before opening new windows/popups

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 2511f6775631069c03a854f50561cb2f1ae42bff..22ec8df21e1d25970b9ae798ba434e8fd7cef959 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1490,6 +1490,12 @@ WebView* RenderViewImpl::createView(WebLocalFrame* creator,
                                     const WebString& frame_name,
                                     WebNavigationPolicy policy,
                                     bool suppress_opener) {
+#if defined(ENABLE_PLUGINS)
+  if (PepperPluginInstanceImpl* plugin = GetFocusedPepperPlugin()) {
+    // Opening a window should exit fullscreen, as it does for HTML5 fullscreen.
+    plugin->FlashSetFullscreen(false, false);
+  }
+#endif
   ViewHostMsg_CreateWindow_Params params;
   params.opener_id = GetRoutingID();
   params.user_gesture = WebUserGestureIndicator::isProcessingUserGesture();