Enable a minimal content/ build on iOS

content/public/test/unittest_test_suite.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_TEST_UNITTEST_TEST_SUITE_H_
 #define CONTENT_PUBLIC_TEST_UNITTEST_TEST_SUITE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
@@ skipping 12 matching lines @@
  public:
    // Takes ownership of |test_suite|.
   explicit UnitTestTestSuite(base::TestSuite* test_suite);
   ~UnitTestTestSuite();
 
   int Run();
 
  private:
   scoped_ptr<base::TestSuite> test_suite_;
 
+#if !defined(OS_IOS)
   class UnitTestWebKitPlatformSupport;
   scoped_ptr<UnitTestWebKitPlatformSupport> webkit_platform_support_;
+#endif
 
   DISALLOW_COPY_AND_ASSIGN(UnitTestTestSuite);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_UNITTEST_TEST_SUITE_H_