Disable tests that trip MOJO_DCHECK in release-with-dcheck builds

mojo/public/cpp/bindings/tests/buffer_unittest.cc

 // Copyright 2014 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 <limits>
 
 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 48 matching lines @@
     EXPECT_EQ(0u, buf.size());
     EXPECT_FALSE(buf.Leak());
   }
 
   // Since we called Leak, ptr is still writable after FixedBuffer went out of
   // scope.
   memset(ptr, 1, 8);
   free(buf_ptr);
 }
 
-#ifdef NDEBUG
+#if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
 TEST(FixedBufferTest, TooBig) {
   internal::FixedBuffer buf(24);
 
   // A little bit too large.
   EXPECT_EQ(reinterpret_cast<void*>(0), buf.Allocate(32));
 
   // Move the cursor forward.
   EXPECT_NE(reinterpret_cast<void*>(0), buf.Allocate(16));
 
   // A lot too large.
   EXPECT_EQ(reinterpret_cast<void*>(0),
             buf.Allocate(std::numeric_limits<size_t>::max() - 1024u));
 
   // A lot too large, leading to possible integer overflow.
   EXPECT_EQ(reinterpret_cast<void*>(0),
             buf.Allocate(std::numeric_limits<size_t>::max() - 8u));
 }
 #endif
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo