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

chrome/browser/cocoa/custom_home_pages_model_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.
 
 #include "base/scoped_nsobject.h"
 #include "chrome/browser/cocoa/browser_test_helper.h"
 #import "chrome/browser/cocoa/custom_home_pages_model.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
 
 // A helper for KVO and NSNotifications. Makes a note that it's been called
 // back.
 @interface CustomHomePageHelper : NSObject {
  @public
   BOOL sawNotification_;
 }
 @end
 
 @implementation CustomHomePageHelper
 - (void)observeValueForKeyPath:(NSString*)keyPath
                       ofObject:(id)object
                         change:(NSDictionary*)change
                        context:(void*)context {
   sawNotification_ = YES;
 }
 
 - (void)entryChanged:(NSNotification*)notify {
   sawNotification_ = YES;
 }
 @end
 
-class CustomHomePagesModelTest : public testing::Test {
+class CustomHomePagesModelTest : public PlatformTest {
  public:
   CustomHomePagesModelTest() {
     model_.reset([[CustomHomePagesModel alloc]
                     initWithProfile:helper_.profile()]);
    }
   ~CustomHomePagesModelTest() { }
 
   BrowserTestHelper helper_;
   scoped_nsobject<CustomHomePagesModel> model_;
 };
@@ skipping 100 matching lines @@
             object:nil];
 
   std::vector<GURL> urls;
   urls.push_back(GURL("http://www.google.com"));
   [model_ setURLs:urls];
   NSObject* entry = [model_ objectInCustomHomePagesAtIndex:0];
   [entry setURL:@"http://www.foo.bar"];
   EXPECT_TRUE(kvo_helper.get()->sawNotification_);
   [[NSNotificationCenter defaultCenter] removeObserver:kvo_helper];
 }