Fix layering violations in WebFrameWidget.

third_party/WebKit/Source/web/WebViewFrameWidget.h

Index: third_party/WebKit/Source/web/WebViewFrameWidget.h
diff --git a/third_party/WebKit/Source/web/WebViewFrameWidget.h b/third_party/WebKit/Source/web/WebViewFrameWidget.h
index 8f39239622bc802b245388d1a51dc7f3ec1ae0a0..7a7a9395deca8b21775a72c4a78028bdf2a49d3f 100644
--- a/third_party/WebKit/Source/web/WebViewFrameWidget.h
+++ b/third_party/WebKit/Source/web/WebViewFrameWidget.h
@@ -6,7 +6,7 @@
 #define WebViewFrameWidget_h
 
 #include "platform/heap/Handle.h"
-#include "public/web/WebFrameWidget.h"
+#include "web/WebFrameWidgetBase.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/RefPtr.h"
 
@@ -31,7 +31,7 @@ class WebWidgetClient;
 // into one class.
 // A more detailed writeup of this transition can be read at
 // https://goo.gl/7yVrnb.
-class WebViewFrameWidget : public WebFrameWidget {
+class WebViewFrameWidget : public WebFrameWidgetBase {
     WTF_MAKE_NONCOPYABLE(WebViewFrameWidget);
 public:
     explicit WebViewFrameWidget(WebWidgetClient*, WebViewImpl&, WebLocalFrameImpl&);
@@ -92,7 +92,9 @@ public:
     bool isTransparent() const override;
     void setIsTransparent(bool) override;
     void setBaseBackgroundColor(WebColor) override;
-    bool forSubframe() const { return false; }
+
+    // WebFrameWidgetBase overrides:
+    bool forSubframe() const override { return false; }
     void scheduleAnimation() override;
     CompositorProxyClient* createCompositorProxyClient() override;
     void setRootGraphicsLayer(GraphicsLayer*) override;