Update css styles after modifying display mode

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index a286581a1cd1a4039e9294a473e55832fd39dc5c..d663dc5990863b7d14e04f4a2d722ee8ed1eeedf 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -1194,9 +1194,15 @@ void FrameView::addPartToUpdate(LayoutEmbeddedObject& object)
 
 void FrameView::setDisplayMode(WebDisplayMode mode)
 {
+    if (mode == m_displayMode)
+        return;
+
     m_displayMode = mode;
-    if (m_frame->document())
+
+    if (m_frame->document()) {
         m_frame->document()->mediaQueryAffectingValueChanged();
+        m_frame->document()->styleResolverChanged();

[Timothy Loh, 2015/08/18 04:12:20]

Perhaps this call should be inside mediaQueryAffectingValueChanged(), since the
other callers all also call it.

+    }
 }
 
 void FrameView::setMediaType(const AtomicString& mediaType)

[Timothy Loh, 2015/08/18 04:12:20]

Can we fix this one too? :-)