Refactor fixed layout mode

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 222 matching lines @@
     virtual float minimumPageScaleFactor() const;
     virtual float maximumPageScaleFactor() const;
     virtual void saveScrollAndScaleState();
     virtual void restoreScrollAndScaleState();
     virtual void resetScrollAndScaleState();
     virtual void setIgnoreViewportTagScaleLimits(bool);
     virtual WebSize contentsPreferredMinimumSize();
 
     virtual float deviceScaleFactor() const;
     virtual void setDeviceScaleFactor(float);
-    virtual bool isFixedLayoutModeEnabled() const;
-    virtual void enableFixedLayoutMode(bool enable);
-    virtual WebSize fixedLayoutSize() const;
+
     virtual void setFixedLayoutSize(const WebSize&);
+
+    // DEPRECATED: Will be removed soon.
+    // See https://codereview.chromium.org/23819019/
+    virtual bool isFixedLayoutModeEnabled() const { return true; }
+    virtual void enableFixedLayoutMode(bool) { }
+    virtual WebSize fixedLayoutSize() const { return WebSize(); }
+
     virtual void enableAutoResizeMode(
         const WebSize& minSize,
         const WebSize& maxSize);
     virtual void disableAutoResizeMode();
     virtual void performMediaPlayerAction(
         const WebMediaPlayerAction& action,
         const WebPoint& location);
     virtual void performPluginAction(
         const WebPluginAction&,
         const WebPoint&);
@@ skipping 182 matching lines @@
     WebCore::IntSize minAutoSize() const
     {
         return m_minAutoSize;
     }
 
     WebCore::IntSize maxAutoSize() const
     {
         return m_maxAutoSize;
     }
 
-    void updatePageDefinedPageScaleConstraints(const WebCore::ViewportDescription&);
+    void updateMainFrameLayoutSize();
+    void updatePageDefinedViewportConstraints(const WebCore::ViewportDescription&);
 
     // Start a system drag and drop operation.
     void startDragging(
         WebCore::Frame*,
         const WebDragData& dragData,
         WebDragOperationsMask mask,
         const WebImage& dragImage,
         const WebPoint& dragImageOffset);
 
     void autofillPopupDidHide()
@@ skipping 373 matching lines @@
 inline WebViewImpl* toWebViewImpl(WebView* webView)
 {
     // We have no ways to check if the specified WebView is an instance of
     // WebViewImpl because WebViewImpl is the only implementation of WebView.
     return static_cast<WebViewImpl*>(webView);
 }
 
 } // namespace WebKit
 
 #endif