Use removeFontFace to avoid resetting fontSelector.

Source/core/page/Page.cpp

Index: Source/core/page/Page.cpp
diff --git a/Source/core/page/Page.cpp b/Source/core/page/Page.cpp
index 3df282a738958a24836310ad978da761d1da342a..21e304f3ca91c79c1f7eca063d8a8b3fd426eb72 100644
--- a/Source/core/page/Page.cpp
+++ b/Source/core/page/Page.cpp
@@ -262,6 +262,14 @@ void Page::setNeedsRecalcStyleInAllFrames()
         frame->document()->styleResolverChanged(RecalcStyleDeferred);
 }
 
+void Page::setNeedsLayoutInAllFrames()
+{
+    for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
+        if (FrameView* view = frame->view())
+            view->setNeedsLayout();
+    }
+}
+
 void Page::refreshPlugins(bool reload)
 {
     if (allPages().isEmpty())
@@ -497,11 +505,18 @@ void Page::settingsChanged(SettingsDelegate::ChangeType changeType)
             if (textAutosizer)
                 textAutosizer->recalculateMultipliers();
         }
-        setNeedsRecalcStyleInAllFrames();
+        // TextAutosizing updates RenderStyle during layout phase (via TextAutosizer::processSubtree).
+        // We should invoke setNeedsLayout here.
+        setNeedsLayoutInAllFrames();
         break;
     case SettingsDelegate::ScriptEnableChange:
         m_inspectorController->scriptsEnabled(settings().scriptEnabled());
         break;
+    case SettingsDelegate::FontFamilyChange:
+        for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext())
+            frame->document()->styleEngine()->updateGenericFontFamilySettings();
+        setNeedsRecalcStyleInAllFrames();
+        break;
     }
 }