Remove base's implicit_cast.

ui/views/style/mac/dialog_button_border_mac_unittest.cc

 // Copyright 2015 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.
 
 #include "ui/views/style/mac/dialog_button_border_mac.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/compositor/canvas_painter.h"
 #include "ui/gfx/canvas.h"
@@ skipping 45 matching lines @@
   const gfx::Point center = view->bounds().CenterPoint();
   gfx::Canvas canvas(view->bounds().size(), 1.0, false /* is_opaque */);
   SkCanvas* sk_canvas = canvas.sk_canvas();
 
   // Read a pixel - it should be blank.
   SkColor initial_pixel;
   SkBitmap bitmap;
   bitmap.allocN32Pixels(1, 1);
   EXPECT_TRUE(sk_canvas->readPixels(&bitmap, center.x(), center.y()));
   initial_pixel = bitmap.getColor(0, 0);
-  EXPECT_EQ(implicit_cast<SkColor>(SK_ColorTRANSPARENT), initial_pixel);
+  EXPECT_EQ(static_cast<SkColor>(SK_ColorTRANSPARENT), initial_pixel);
 
   view->Paint(ui::CanvasPainter(&canvas, 1.f).context());
 
   // Ensure save()/restore() calls are balanced.
   EXPECT_EQ(1, sk_canvas->getSaveCount());
 
   // Ensure "something" happened. This assumes the border is a
   // DialogButtonBorderMac, which always modifies the center pixel.
   EXPECT_TRUE(sk_canvas->readPixels(&bitmap, center.x(), center.y()));
   return bitmap.getColor(0, 0);
 }
 
 void TestPaintAllStates(CustomButton* button, bool verify) {
   for (int i = 0; i < Button::STATE_COUNT; ++i) {
     Button::ButtonState state = static_cast<Button::ButtonState>(i);
     SCOPED_TRACE(testing::Message() << "Button::ButtonState: " << state);
     button->SetState(state);
     SkColor color = TestPaint(button);
     if (verify)
-      EXPECT_NE(implicit_cast<SkColor>(SK_ColorTRANSPARENT), color);
+      EXPECT_NE(static_cast<SkColor>(SK_ColorTRANSPARENT), color);
   }
 }
 
 }  // namespace
 
 using DialogButtonBorderMacTest = ViewsTestBase;
 
 // Verify that the DialogButtonBorderMac insets are consistent with the
 // minimum size, and they're correctly carried across to the View's preferred
 // size.
@@ skipping 90 matching lines @@
 
   // Any call to SetBorder() will immediately prevent themed buttons and adding
   // to a Widget (to pick up a NativeTheme) shouldn't restore them.
   button.SetBorder(Border::NullBorder());
   EXPECT_FALSE(BorderIsDialogButton(button));
   button.SimulateAddToWidget();
   EXPECT_FALSE(BorderIsDialogButton(button));
 }
 
 }  // namespace views