Expose a way to set a view's base background color.

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 180 matching lines @@
     virtual void setPermissionClient(WebPermissionClient*);
     virtual void setPrerendererClient(WebPrerendererClient*) OVERRIDE;
     virtual void setSpellCheckClient(WebSpellCheckClient*);
     virtual void setValidationMessageClient(WebValidationMessageClient*) OVERRIDE;
     virtual void setPasswordGeneratorClient(WebPasswordGeneratorClient*) OVERRIDE;
     virtual WebSettings* settings();
     virtual WebString pageEncoding() const;
     virtual void setPageEncoding(const WebString& encoding);
     virtual bool isTransparent() const;
     virtual void setIsTransparent(bool value);
+    virtual void setBaseBackgroundColor(WebColor);
     virtual bool tabsToLinks() const;
     virtual void setTabsToLinks(bool value);
     virtual bool tabKeyCyclesThroughElements() const;
     virtual void setTabKeyCyclesThroughElements(bool value);
     virtual bool isActive() const;
     virtual void setIsActive(bool value);
     virtual void setDomainRelaxationForbidden(bool, const WebString& scheme);
     virtual bool dispatchBeforeUnloadEvent();
     virtual void dispatchUnloadEvent();
     virtual WebFrame* mainFrame();
@@ skipping 106 matching lines @@
     virtual void setShowScrollBottleneckRects(bool);
 
     // WebViewImpl
 
     void suppressInvalidations(bool enable);
     void invalidateRect(const WebCore::IntRect&);
 
     void setIgnoreInputEvents(bool newValue);
     WebDevToolsAgentPrivate* devToolsAgentPrivate() { return m_devToolsAgent.get(); }
 
+    WebCore::Color baseBackgroundColor() const { return m_baseBackgroundColor; }
+
     PageOverlayList* pageOverlays() const { return m_pageOverlays.get(); }
 
     void setOverlayLayer(WebCore::GraphicsLayer*);
 
     const WebPoint& lastMouseDownPoint() const
     {
         return m_lastMouseDownPoint;
     }
 
     WebCore::Frame* focusedWebCoreFrame() const;
@@ skipping 489 matching lines @@
     int m_flingModifier;
     bool m_flingSourceDevice;
     OwnPtr<LinkHighlight> m_linkHighlight;
     OwnPtr<ValidationMessageClientImpl> m_validationMessage;
 
     bool m_showFPSCounter;
     bool m_showPaintRects;
     bool m_showDebugBorders;
     bool m_continuousPaintingEnabled;
     bool m_showScrollBottleneckRects;
+    WebColor m_baseBackgroundColor;
 };
 
 } // namespace WebKit
 
 #endif