Sets a transparent background for out-of-process subframes.

third_party/WebKit/public/web/WebView.h

 /*
  * Copyright (C) 2009, 2010, 2011, 2012 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 91 matching lines @@
     // Options -------------------------------------------------------------
 
     // The returned pointer is valid for the lifetime of the WebView.
     virtual WebSettings* settings() = 0;
 
     // Corresponds to the encoding of the main frame.  Setting the page
     // encoding may cause the main frame to reload.
     virtual WebString pageEncoding() const = 0;
     virtual void setPageEncoding(const WebString&) = 0;
 
-    // Makes the WebView transparent.  This is useful if you want to have
-    // some custom background rendered behind it.
-    virtual bool isTransparent() const = 0;
-    virtual void setIsTransparent(bool) = 0;
-
-    // Sets the base color used for this WebView's background. This is in effect
-    // the default background color used for pages with no background-color
-    // style in effect, or used as the alpha-blended basis for any pages with
-    // translucent background-color style. (For pages with opaque
-    // background-color style, this property is effectively ignored).
-    // Setting this takes effect for the currently loaded page, if any, and
-    // persists across subsequent navigations. Defaults to white prior to the
-    // first call to this method.
-    virtual void setBaseBackgroundColor(WebColor) = 0;
-
     // Controls whether pressing Tab key advances focus to links.
     virtual bool tabsToLinks() const = 0;
     virtual void setTabsToLinks(bool) = 0;
 
     // Method that controls whether pressing Tab key cycles through page
     // elements or inserts a '\t' char in the focused text area.
     virtual bool tabKeyCyclesThroughElements() const = 0;
     virtual void setTabKeyCyclesThroughElements(bool) = 0;
 
     // Controls the WebView's active state, which may affect the rendering
@@ skipping 358 matching lines @@
     // context's ability to deal with that failure gracefully can be tested.
     virtual void forceNextDrawingBufferCreationToFail() = 0;
 
 protected:
     ~WebView() {}
 };
 
 } // namespace blink
 
 #endif