Move closure_blocks_leopard_compat to base now that it's used by two modules.

base/mac/closure_blocks_leopard_compat_unittest.cc

 // Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
+#include "base/mac/closure_blocks_leopard_compat.h"
 
 #include "base/mac/mac_util.h"
-#include "content/browser/mac/closure_blocks_leopard_compat.h"
+#include "testing/gtest/include/gtest/gtest.h"
 
 // Used in ClosureBlocksLeopardCompatTest.Global. Putting a block at global
 // scope results in a block structure whose isa field is set to
 // NSConcreteGlobalBlock, ensuring that symbol is referenced. This test needs
 // to be able to load on 10.5 where that symbol is not present at runtime, so
 // the real test here is that the symbol is weakly imported. If not, the
 // executable will fail to load.
 void (^global_block)(bool*) = ^(bool* ran_pointer) { *ran_pointer = true; };
 
 namespace {
@@ skipping 70 matching lines @@
 
     Block_release(copied_block);
 
     rv = local_block();
     EXPECT_EQ(4, rv);
     EXPECT_EQ(rv, value);
   }
 }
 
 }  // namespace