Remove deprecated gfx::Image::operator NSImage*().

chrome/browser/ui/tests/ui_gfx_image_unittest.mm

Index: chrome/browser/ui/tests/ui_gfx_image_unittest.mm
diff --git a/chrome/browser/ui/tests/ui_gfx_image_unittest.mm b/chrome/browser/ui/tests/ui_gfx_image_unittest.mm
index 8f11203c7d82daee6a06ee5819630be4397ed26a..1e81579c0d4181d0235c3f97a96517c45fb2dfe9 100644
--- a/chrome/browser/ui/tests/ui_gfx_image_unittest.mm
+++ b/chrome/browser/ui/tests/ui_gfx_image_unittest.mm
@@ -18,9 +18,10 @@ class UiGfxImageTest : public CocoaTest {
 
 TEST_F(UiGfxImageTest, CheckColor) {
   gfx::Image image(gfx::test::CreateBitmap(25, 25));
-  [image lockFocus];
+  NSImage* ns_image = image.ToNSImage();
+  [ns_image lockFocus];
   NSColor* color = NSReadPixel(NSMakePoint(10, 10));
-  [image unlockFocus];
+  [ns_image unlockFocus];
 
   // SkBitmapToNSImage returns a bitmap in the calibrated color space (sRGB),
   // while NSReadPixel returns a color in the device color space. Convert back