Remove dependency on ui::ScaleFactor from ui/gfx

ui/base/clipboard/clipboard_mac.mm

Index: ui/base/clipboard/clipboard_mac.mm
diff --git a/ui/base/clipboard/clipboard_mac.mm b/ui/base/clipboard/clipboard_mac.mm
index 85bd16d8ae6f29d51a90486e7514bfd4e9b079e5..82ee1d0a969411a033579a13e1806b811ea4ce7f 100644
--- a/ui/base/clipboard/clipboard_mac.mm
+++ b/ui/base/clipboard/clipboard_mac.mm
@@ -358,7 +358,7 @@ SkBitmap Clipboard::ReadImage(Buffer buffer) const {
   int width = [image size].width;
   int height = [image size].height;
 
-  gfx::Canvas canvas(gfx::Size(width, height), ui::SCALE_FACTOR_100P, false);
+  gfx::Canvas canvas(gfx::Size(width, height), 1.0f, false);
   {
     skia::ScopedPlatformPaint scoped_platform_paint(canvas.sk_canvas());
     CGContextRef gc = scoped_platform_paint.GetPlatformSurface();