[Mac] Organize all tab/tab strip files into chrome/browser/ui/cocoa/tabs/....

chrome/browser/ui/cocoa/side_tab_strip_view_unittest.mm

-// Copyright (c) 2010 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 <Cocoa/Cocoa.h>
-
-#include "base/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/side_tab_strip_view.h"
-#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/platform_test.h"
-
-namespace {
-
-class SideTabStripViewTest : public CocoaTest {
- public:
-  SideTabStripViewTest() {
-    NSRect frame = NSMakeRect(0, 0, 100, 30);
-    scoped_nsobject<SideTabStripView> view(
-        [[SideTabStripView alloc] initWithFrame:frame]);
-    view_ = view.get();
-    [[test_window() contentView] addSubview:view_];
-  }
-
-  SideTabStripView* view_;
-};
-
-TEST_VIEW(SideTabStripViewTest, view_)
-
-}  // namespace