Change declared variable name in gfx::ScaleTo*Size.

ui/gfx/geometry/size.h

Index: ui/gfx/geometry/size.h
diff --git a/ui/gfx/geometry/size.h b/ui/gfx/geometry/size.h
index 6eb05227aba19f2bfd791b4c56340fb01da4e8d3..96f667394e47b4bf1e5e20bf7e4d6cb126683bfd 100644
--- a/ui/gfx/geometry/size.h
+++ b/ui/gfx/geometry/size.h
@@ -88,15 +88,15 @@ void PrintTo(const Size& size, ::std::ostream* os);
 GFX_EXPORT Size ScaleToCeiledSize(const Size& size,
                                   float x_scale,
                                   float y_scale);
-GFX_EXPORT Size ScaleToCeiledSize(const Size& size, float x_scale);
+GFX_EXPORT Size ScaleToCeiledSize(const Size& size, float scale);
 GFX_EXPORT Size ScaleToFlooredSize(const Size& size,
                                    float x_scale,
                                    float y_scale);
-GFX_EXPORT Size ScaleToFlooredSize(const Size& size, float x_scale);
+GFX_EXPORT Size ScaleToFlooredSize(const Size& size, float scale);
 GFX_EXPORT Size ScaleToRoundedSize(const Size& size,
                                    float x_scale,
                                    float y_scale);
-GFX_EXPORT Size ScaleToRoundedSize(const Size& size, float x_scale);
+GFX_EXPORT Size ScaleToRoundedSize(const Size& size, float scale);
 
 }  // namespace gfx