Fix fullscreen elements in pinch viewport mode.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index d0526613cc9a424cefd49cba083fbdf51d5c76b4..9e744bb4454bd01412076d71c07981f4afa8e26f 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -38,6 +38,7 @@
 #include "core/clipboard/DataObject.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentMarkerController.h"
+#include "core/dom/Fullscreen.h"
 #include "core/dom/NodeRenderingTraversal.h"
 #include "core/dom/Text.h"
 #include "core/editing/Editor.h"
@@ -80,6 +81,7 @@
 #include "core/page/PointerLockController.h"
 #include "core/page/ScopedPageLoadDeferrer.h"
 #include "core/page/TouchDisambiguation.h"
+#include "core/rendering/RenderFullScreen.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/RenderWidget.h"
 #include "core/rendering/TextAutosizer.h"
@@ -1757,6 +1759,9 @@ void WebViewImpl::resize(const WebSize& newSize)
         performResize();
     }
 
+    if (m_fullscreenController->isFullscreen())
+        Fullscreen::from(*view->frame().document()).fullScreenRenderer()->updateStyle();
+
     if (settings()->viewportEnabled()) {
         // Relayout immediately to recalculate the minimum scale limit.
         if (view->needsLayout())