Consolidate Browser Creation.

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

 // Copyright (c) 2012 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 <vector>
 
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 46 matching lines @@
 @end
 
 namespace {
 
 class TabStripControllerTest : public CocoaProfileTest {
  public:
   virtual void SetUp() {
     CocoaProfileTest::SetUp();
     ASSERT_TRUE(browser());
 
-    BrowserWindow* browser_window = CreateBrowserWindow();
-    NSWindow* window = browser_window->GetNativeWindow();
+    NSWindow* window = browser()->window()->GetNativeWindow();
     NSView* parent = [window contentView];
     NSRect content_frame = [parent frame];
 
     // Create the "switch view" (view that gets changed out when a tab
     // switches).
     NSRect switch_frame = NSMakeRect(0, 0, content_frame.size.width, 500);
     scoped_nsobject<NSView> switch_view(
         [[NSView alloc] initWithFrame:switch_frame]);
     [parent addSubview:switch_view.get()];
 
@@ skipping 143 matching lines @@
 
   [controller_.get() mouseMoved:event];
   EXPECT_STREQ("Tab2",
       [[controller_ view:nil
         stringForToolTip:nil
                    point:NSMakePoint(0,0)
                 userData:nil] cStringUsingEncoding:NSASCIIStringEncoding]);
 }
 
 }  // namespace