Normalize top controls offset to (0, 1), Blink-side.

public/web/WebWidget.h

 /*
  * Copyright (C) 2009 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 253 matching lines @@
     virtual void didChangeWindowResizerRect() { }
 
     // The page background color. Can be used for filling in areas without
     // content.
     virtual WebColor backgroundColor() const { return 0xFFFFFFFF; /* SK_ColorWHITE */ }
 
     // The currently open page popup, which are calendar and datalist pickers
     // but not the select popup.
     virtual WebPagePopup* pagePopup() const { return 0; }
 
-    // Sets the height subtracted from the Widget to accomodate the top controls.
+    // TODO(aelias): Delete this after Blink roll.
     virtual void setTopControlsLayoutHeight(float) { }
 
+    // Notification about the top controls height.  If the boolean is true, then

[Rick Byers, 2015/02/07 03:13:52]

nit: it's not clear that height here is a normalized value.  Perhaps change the
param to 'heightFraction' and clarify in the comment.

[aelias_OOO_until_Jul13, 2015/02/07 03:32:08]

Height is still an absolute value here.  The one that's normalized is in
applyViewportDeltas.  I just renamed that one to topControlsShownRatioDelta to
clarify it.

(I needed to change this height method to add a boolean so that Blink is capable
of denormalizing the value without the layout size being changed.)

+    // the embedder shrunk the WebView size by the top controls height.
+    virtual void setTopControlsHeight(float height, bool topControlsShrinkLayoutSize) { }
+
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif