[Cocoa] Tab audio mute control, behind a switch (off by default).

chrome/browser/ui/cocoa/tabs/media_indicator_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/tabs/media_indicator_view.h"
-
-#include "base/mac/scoped_nsobject.h"
-#include "base/message_loop/message_loop.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/platform_test.h"
-
-namespace {
-
-class MediaIndicatorViewTest : public CocoaTest {
- public:
-  MediaIndicatorViewTest() {
-    view_.reset([[MediaIndicatorView alloc] init]);
-    EXPECT_TRUE(view_ != nil);
-    EXPECT_EQ(TAB_MEDIA_STATE_NONE, [view_ animatingMediaState]);
-
-    [[test_window() contentView] addSubview:view_.get()];
-
-    [view_ updateIndicator:TAB_MEDIA_STATE_AUDIO_PLAYING];
-    EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_PLAYING, [view_ animatingMediaState]);
-  }
-
-  base::scoped_nsobject<MediaIndicatorView> view_;
-  base::MessageLoopForUI message_loop_;  // Needed for gfx::Animation.
-};
-
-TEST_VIEW(MediaIndicatorViewTest, view_)
-
-}  // namespace