A page should exit fullscreen mode if it opens a new popup

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index dce10f4deaafdaf62638d57c9fdb8a7c6c8052b2..d3bc556ed66b6c71b8a1581e935903de8c412436 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -71,6 +71,7 @@
 #include "core/accessibility/AXObjectCache.h"
 #include "core/accessibility/AccessibilityObject.h"
 #include "core/dom/Document.h"
+#include "core/dom/DocumentFullscreen.h"
 #include "core/dom/Node.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/loader/DocumentLoader.h"
@@ -238,6 +239,8 @@ Page* ChromeClientImpl::createWindow(
     if (policy == WebNavigationPolicyIgnore)
         policy = getNavigationPolicy();
 
+    DocumentFullscreen::webkitCancelFullScreen(frame->document());
+
     WebViewImpl* newView = toWebViewImpl(
         m_webView->client()->createView(WebFrameImpl::fromFrame(frame), WrappedResourceRequest(r.resourceRequest()), features, r.frameName(), policy));
     if (!newView)