Update {virtual,override} to follow C++11 style in components.

components/policy/core/common/async_policy_provider_unittest.cc

 // 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.
 
 #include "components/policy/core/common/async_policy_provider.h"
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 23 matching lines @@
            POLICY_LEVEL_MANDATORY,
            POLICY_SCOPE_USER,
            new base::StringValue(value),
            NULL);
 }
 
 class MockPolicyLoader : public AsyncPolicyLoader {
  public:
   explicit MockPolicyLoader(
       scoped_refptr<base::SequencedTaskRunner> task_runner);
-  virtual ~MockPolicyLoader();
+  ~MockPolicyLoader() override;
 
   // Load() returns a scoped_ptr<PolicyBundle> but it can't be mocked because
   // scoped_ptr is moveable but not copyable. This override forwards the
   // call to MockLoad() which returns a PolicyBundle*, and returns a copy
   // wrapped in a passed scoped_ptr.
-  virtual scoped_ptr<PolicyBundle> Load() override;
+  scoped_ptr<PolicyBundle> Load() override;
 
   MOCK_METHOD0(MockLoad, const PolicyBundle*());
   MOCK_METHOD0(InitOnBackgroundThread, void());
   MOCK_METHOD0(LastModificationTime, base::Time());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockPolicyLoader);
 };
 
 MockPolicyLoader::MockPolicyLoader(
@@ skipping 157 matching lines @@
   EXPECT_CALL(observer, OnUpdatePolicy(provider_.get())).Times(0);
   provider_->Shutdown();
   loop_.RunUntilIdle();
   Mock::VerifyAndClearExpectations(&observer);
 
   provider_->RemoveObserver(&observer);
   provider_.reset();
 }
 
 }  // namespace policy