Cleanup namespace usage in Source/binding and Source/web

Source/web/FindInPageCoordinates.h

 /*
  * Copyright (C) 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 18 matching lines @@
  */
 
 #ifndef FindInPageCoordinates_h
 #define FindInPageCoordinates_h
 
 #include "platform/geometry/FloatRect.h"
 
 namespace blink {
 class Range;
 class RenderObject;
-}
-
-namespace blink {
 
 // Find-in-page coordinate conversion methods.
 //
 // This coordinate system is designed to give consistent tickmarks in cases where find matches
 // are in scrollable areas but might not be visible (e.g. child frames, scroll:overflow).
 // In these cases, using absolute positions might lead to tickmarks pointing outside the visible
 // area of its container, which is counter-intuitive for users.
 //
 // Find-in-page coordinates are represented as normalized fractions of the main frame document with
 // the property that they are built by composing the relative position of each renderer to the maximum
 // effective layout size of its container all the way up the render tree. The resulting coordinates
 // are scroll-independent, representing any contents scaled to the visible area of their container.
 // The provided methods support scroll:overflow and are CSS position and transform-friendly.
 
 FloatRect findInPageRectFromAbsoluteRect(const FloatRect&, const RenderObject*);
 FloatRect findInPageRectFromRange(Range*);
 
 } // namespace blink
 
 #endif