Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/cocoa/tab_contents/preview_drop_shadow_view_unittest.mm

-// Copyright 2013 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/tab_contents/preview_drop_shadow_view.h"
-
-#include "base/memory/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
-
-class PreviewDropShadowViewTest : public CocoaTest {
- public:
-  PreviewDropShadowViewTest() {
-    NSView* contentView = [test_window() contentView];
-    view_.reset(
-        [[PreviewDropShadowView alloc] initWithFrame:[contentView bounds]]);
-    [contentView addSubview:view_];
-  }
-
- protected:
-  scoped_nsobject<PreviewDropShadowView> view_;
-};
-
-TEST_VIEW(PreviewDropShadowViewTest, view_);
-
-TEST_F(PreviewDropShadowViewTest, PreferredHeight) {
-  EXPECT_LT(0, [PreviewDropShadowView preferredHeight]);
-}