Standardize usage of virtual/override/final in sync/

sync/internal_api/attachments/attachment_service_proxy_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 "sync/internal_api/public/attachments/attachment_service_proxy.h"
 
 #include "base/bind.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 14 matching lines @@
 // its methods are invoked.
 class StubAttachmentService : public AttachmentService,
                               public base::NonThreadSafe {
  public:
   StubAttachmentService() : call_count_(0), weak_ptr_factory_(this) {
     // DetachFromThread because we will be constructed in one thread and
     // used/destroyed in another.
     DetachFromThread();
   }
 
-  virtual ~StubAttachmentService() {}
+  ~StubAttachmentService() override {}
 
-  virtual AttachmentStore* GetStore() override { return NULL; }
+  AttachmentStore* GetStore() override { return NULL; }
 
-  virtual void GetOrDownloadAttachments(const AttachmentIdList& attachment_ids,
-                                        const GetOrDownloadCallback& callback)
-      override {
+  void GetOrDownloadAttachments(
+      const AttachmentIdList& attachment_ids,
+      const GetOrDownloadCallback& callback) override {
     CalledOnValidThread();
     Increment();
     scoped_ptr<AttachmentMap> attachments(new AttachmentMap());
     base::MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(callback,
                    AttachmentService::GET_UNSPECIFIED_ERROR,
                    base::Passed(&attachments)));
   }
 
-  virtual void DropAttachments(const AttachmentIdList& attachment_ids,
-                               const DropCallback& callback) override {
+  void DropAttachments(const AttachmentIdList& attachment_ids,
+                       const DropCallback& callback) override {
     CalledOnValidThread();
     Increment();
     base::MessageLoop::current()->PostTask(
         FROM_HERE, base::Bind(callback, AttachmentService::DROP_SUCCESS));
   }
 
-  virtual void UploadAttachments(
-      const AttachmentIdSet& attachments_ids) override {
+  void UploadAttachments(const AttachmentIdSet& attachments_ids) override {
     CalledOnValidThread();
     Increment();
   }
 
   virtual base::WeakPtr<AttachmentService> AsWeakPtr() {
     return weak_ptr_factory_.GetWeakPtr();
   }
 
   // Return the number of method invocations.
   int GetCallCount() const {
@@ skipping 128 matching lines @@
   // Now that the wrapped object has been destroyed, call again and see that we
   // don't crash and the count remains the same.
   proxy->GetOrDownloadAttachments(AttachmentIdList(), callback_get_or_download);
   WaitForStubThread();
   WaitForStubThread();
   loop.RunUntilIdle();
   EXPECT_EQ(1, count_callback_get_or_download);
 }
 
 }  // namespace syncer