gfx: Remove implicit conversions from gfx::Rect to gfx::RectF.

ui/gfx/geometry/rect.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Defines a simple integer rectangle class.  The containment semantics
 // are array-like; that is, the coordinate (x, y) is considered to be
 // contained by the rectangle, but the coordinate (x + width, y) is not.
 // The class will happily let you create malformed rectangles (that is,
 // rectangles with negative width and/or height), but there will be assertions
 // in the operations (such as Contains()) to complain in this case.
 
 #ifndef UI_GFX_GEOMETRY_RECT_H_
 #define UI_GFX_GEOMETRY_RECT_H_
 
 #include <cmath>
 #include <iosfwd>
 #include <string>
 
 #include "base/numerics/safe_conversions.h"
 #include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/geometry/vector2d.h"
 
 #if defined(OS_WIN)
 typedef struct tagRECT RECT;
 #elif defined(OS_MACOSX)
 typedef struct CGRect CGRect;
 #endif
 
 namespace gfx {
@@ skipping 18 matching lines @@
   ~Rect() {}
 
 #if defined(OS_WIN)
   // Construct an equivalent Win32 RECT object.
   RECT ToRECT() const;
 #elif defined(OS_MACOSX)
   // Construct an equivalent CoreGraphics object.
   CGRect ToCGRect() const;
 #endif
 
-  operator RectF() const {
-    return RectF(static_cast<float>(x()), static_cast<float>(y()),
-                 static_cast<float>(width()), static_cast<float>(height()));
-  }
-
   int x() const { return origin_.x(); }
   void set_x(int x) { origin_.set_x(x); }
 
   int y() const { return origin_.y(); }
   void set_y(int y) { origin_.set_y(y); }
 
   int width() const { return size_.width(); }
   void set_width(int width) { size_.set_width(width); }
 
   int height() const { return size_.height(); }
@@ skipping 199 matching lines @@
 }
 
 // This is declared here for use in gtest-based unit tests but is defined in
 // the gfx_test_support target. Depend on that to use this in your unit test.
 // This should not be used in production code - call ToString() instead.
 void PrintTo(const Rect& rect, ::std::ostream* os);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_RECT_H_