Make all of our unit tests be PlatformTests to get an autorelease pool....

chrome/browser/cocoa/tab_view_unittest.mm

 // Copyright (c) 2009 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/cocoa/tab_view.h"
 #import "chrome/browser/cocoa/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
 
 namespace {
 
-class TabViewTest : public testing::Test {
+class TabViewTest : public PlatformTest {
  public:
   TabViewTest() {
     NSRect frame = NSMakeRect(0, 0, 50, 30);
     view_.reset([[TabView alloc] initWithFrame:frame]);
     [cocoa_helper_.contentView() addSubview:view_.get()];
   }
 
   scoped_nsobject<TabView> view_;
   CocoaTestHelper cocoa_helper_;  // Inits Cocoa, creates window, etc...
 };
@@ skipping 15 matching lines @@
   [view_ setHoverAlpha:1.0];
   [view_ display];
 }
 
 // Test dragging and mouse tracking.
 TEST_F(TabViewTest, MouseTracking) {
   // TODO(pinkerton): Test dragging out of window
 }
 
 }  // namespace