Make mojo::system::Core not own the PlatformSupport.

mojo/edk/system/core_test_base.h

 // Copyright 2013 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 MOJO_EDK_SYSTEM_CORE_TEST_BASE_H_
 #define MOJO_EDK_SYSTEM_CORE_TEST_BASE_H_
 
-#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
+#include "mojo/edk/embedder/simple_platform_support.h"
 #include "mojo/public/c/system/types.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace system {
 
 class Core;
 class Awakable;
 
 namespace test {
@@ skipping 10 matching lines @@
   void SetUp() override;
   void TearDown() override;
 
  protected:
   // |info| must remain alive until the returned handle is closed.
   MojoHandle CreateMockHandle(MockHandleInfo* info);
 
   Core* core() { return core_; }
 
  private:
+  embedder::SimplePlatformSupport platform_support_;
   Core* core_;
 
   DISALLOW_COPY_AND_ASSIGN(CoreTestBase);
 };
 
 class CoreTestBase_MockHandleInfo {
  public:
   CoreTestBase_MockHandleInfo();
   ~CoreTestBase_MockHandleInfo();
 
@@ skipping 56 matching lines @@
   std::vector<Awakable*> added_awakables_;
 
   DISALLOW_COPY_AND_ASSIGN(CoreTestBase_MockHandleInfo);
 };
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CORE_TEST_BASE_H_