Remove IntSize::area, and rename IntSize::area_safe() to IntSize::area()

Source/platform/geometry/IntSize.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 80 matching lines @@
     }
 
     void clampToMinimumSize(const IntSize& minimumSize)
     {
         if (m_width < minimumSize.width())
             m_width = minimumSize.width();
         if (m_height < minimumSize.height())
             m_height = minimumSize.height();
     }
 
-    int area() const
-    {
-        return m_width * m_height;
-    }
-
     // Return area in a uint64_t to avoid overflow.
-    uint64_t area_safe() const
+    uint64_t area() const
     {
         return static_cast<uint64_t>(width()) * height();
     }
 
     int diagonalLengthSquared() const
     {
         return m_width * m_width + m_height * m_height;
     }
 
     IntSize transposedSize() const
@@ skipping 50 matching lines @@
 }
 
 inline bool operator!=(const IntSize& a, const IntSize& b)
 {
     return a.width() != b.width() || a.height() != b.height();
 }
 
 } // namespace WebCore
 
 #endif // IntSize_h