Move the C bindings tests to the new location.

mojo/public/c/tests/bindings/struct_unittest.cc

 // Copyright 2016 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.
 
 // TODO(vardhan): Needs a lot more testing.
 
 #include <mojo/bindings/struct.h>
 
 #include <mojo/bindings/array.h>
 #include <mojo/bindings/internal/util.h>
 #include <string.h>
 
-#include "mojo/public/c/bindings/tests/testing_util.h"
+#include "mojo/public/c/tests/bindings/testing_util.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/interfaces/bindings/tests/rect.mojom-c.h"
 #include "mojo/public/interfaces/bindings/tests/test_structs.mojom-c.h"
 #include "mojo/public/interfaces/bindings/tests/test_unions.mojom-c.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 #define BYTES_LEFT_AFTER_FIELD(type, field) \
   (sizeof(type) - offsetof(type, field))
@@ skipping 332 matching lines @@
     copied_struct =
         mojo_test_NullableHandleStruct_DeepCopy(&buf, &handle_struct);
     ASSERT_TRUE(copied_struct);
     // The old and the new copy should both have the handles.
     EXPECT_EQ(static_cast<MojoHandle>(123), handle_struct.h);
     EXPECT_EQ(static_cast<MojoHandle>(123), copied_struct->h);
   }
 }
 
 }  // namespace