Revert of [Mac] Fix rough-looking profile picker text, especially with a dark theme.

chrome/browser/ui/cocoa/tabs/tab_strip_background_view_unittest.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_background_view_unittest.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_background_view_unittest.mm b/chrome/browser/ui/cocoa/tabs/tab_strip_background_view_unittest.mm
deleted file mode 100644
index 6151556d5d57ef0dcfbef404d0c7338a0ee8dace..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_background_view_unittest.mm
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2017 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.
-
-#import "chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h"
-
-#import "chrome/browser/ui/cocoa/test/cocoa_test_helper.h"
-#include "ui/base/default_theme_provider.h"
-
-@class NSVisualEffectView;
-
-namespace {
-
-bool ContainsViewOfClass(NSView* view, Class cls) {
-  if ([view isKindOfClass:cls])
-    return true;
-  for (NSView* subview in view.subviews) {
-    if (ContainsViewOfClass(subview, cls))
-      return true;
-  }
-  return false;
-}
-
-class TabStripBackgroundViewTest : public CocoaTest {
- protected:
-  const base::scoped_nsobject<TabStripBackgroundView>
-      tab_strip_background_view_{
-          [[TabStripBackgroundView alloc] initWithFrame:NSZeroRect]};
-};
-
-class MockThemeProvider : public ui::DefaultThemeProvider {
- public:
-  bool UsingSystemTheme() const override { return using_system_theme_; }
-
-  void SetUsingSystemTheme(bool using_system_theme) {
-    using_system_theme_ = using_system_theme;
-  }
-
- private:
-  bool using_system_theme_ = true;
-};
-
-}  // namespace
-
-@interface TabStripBackgroundViewTestWindow : NSWindow
-@property(nonatomic) const ui::ThemeProvider* themeProvider;
-@end
-
-@implementation TabStripBackgroundViewTestWindow
-@synthesize themeProvider = themeProvider_;
-@end
-
-TEST_F(TabStripBackgroundViewTest, TestVisualEffectView) {
-  // TODO(sdy): Remove once we no longer support 10.9.
-  // Skip this test when running on an OS without NSVisualEffectView.
-  if (![NSVisualEffectView class])
-    return;
-
-  auto has_visual_effect_view = [&]() {
-    return ContainsViewOfClass(tab_strip_background_view_,
-                               [NSVisualEffectView class]);
-  };
-
-  EXPECT_FALSE(has_visual_effect_view());
-
-  base::scoped_nsobject<TabStripBackgroundViewTestWindow>
-      scoped_window([[TabStripBackgroundViewTestWindow alloc] init]);
-  TabStripBackgroundViewTestWindow* window = scoped_window.get();
-
-  MockThemeProvider theme_provider;
-  window.themeProvider = &theme_provider;
-
-  [window.contentView addSubview:tab_strip_background_view_];
-
-  [window makeKeyAndOrderFront:nil];
-  [tab_strip_background_view_ windowDidChangeActive];
-  EXPECT_TRUE(has_visual_effect_view());
-
-  window.styleMask |= NSFullScreenWindowMask;
-  EXPECT_FALSE(has_visual_effect_view());
-
-  window.styleMask &= ~NSFullScreenWindowMask;
-  EXPECT_TRUE(has_visual_effect_view());
-
-  theme_provider.SetUsingSystemTheme(false);
-  [tab_strip_background_view_ windowDidChangeTheme];
-  EXPECT_FALSE(has_visual_effect_view());
-
-  theme_provider.SetUsingSystemTheme(true);
-  [tab_strip_background_view_ windowDidChangeTheme];
-  EXPECT_TRUE(has_visual_effect_view());
-}