Enforce marking "override" for functions overriding Blink.

content/renderer/media/android/media_info_loader.h

Index: content/renderer/media/android/media_info_loader.h
diff --git a/content/renderer/media/android/media_info_loader.h b/content/renderer/media/android/media_info_loader.h
index b421fb3796b58bf36bc58ef279d3a0cf791d1c7f..067e5802f127f29d3bf9dc12f4169265bc5bbb57 100644
--- a/content/renderer/media/android/media_info_loader.h
+++ b/content/renderer/media/android/media_info_loader.h
@@ -59,7 +59,7 @@ class CONTENT_EXPORT MediaInfoLoader : private blink::WebURLLoaderClient {
       const GURL& url,
       blink::WebMediaPlayer::CORSMode cors_mode,
       const ReadyCB& ready_cb);
-  virtual ~MediaInfoLoader();
+  ~MediaInfoLoader() override;
 
   // Start loading media info.
   void Start(blink::WebFrame* frame);
@@ -80,32 +80,25 @@ class CONTENT_EXPORT MediaInfoLoader : private blink::WebURLLoaderClient {
       blink::WebURLLoader* loader,
       blink::WebURLRequest& newRequest,
       const blink::WebURLResponse& redirectResponse);
-  virtual void didSendData(
-      blink::WebURLLoader* loader,
-      unsigned long long bytesSent,
-      unsigned long long totalBytesToBeSent);
-  virtual void didReceiveResponse(
-      blink::WebURLLoader* loader,
-      const blink::WebURLResponse& response);
-  virtual void didDownloadData(
-      blink::WebURLLoader* loader,
-      int data_length,
-      int encodedDataLength);
-  virtual void didReceiveData(
-      blink::WebURLLoader* loader,
-      const char* data,
-      int data_length,
-      int encoded_data_length);
-  virtual void didReceiveCachedMetadata(
-      blink::WebURLLoader* loader,
-      const char* data, int dataLength);
-  virtual void didFinishLoading(
-      blink::WebURLLoader* loader,
-      double finishTime,
-      int64_t total_encoded_data_length);
-  virtual void didFail(
-      blink::WebURLLoader* loader,
-      const blink::WebURLError&);
+  void didSendData(blink::WebURLLoader* loader,
+                   unsigned long long bytesSent,
+                   unsigned long long totalBytesToBeSent) override;
+  void didReceiveResponse(blink::WebURLLoader* loader,
+                          const blink::WebURLResponse& response) override;
+  void didDownloadData(blink::WebURLLoader* loader,
+                       int data_length,
+                       int encodedDataLength) override;
+  void didReceiveData(blink::WebURLLoader* loader,
+                      const char* data,
+                      int data_length,
+                      int encoded_data_length) override;
+  void didReceiveCachedMetadata(blink::WebURLLoader* loader,
+                                const char* data,
+                                int dataLength) override;
+  void didFinishLoading(blink::WebURLLoader* loader,
+                        double finishTime,
+                        int64_t total_encoded_data_length) override;
+  void didFail(blink::WebURLLoader* loader, const blink::WebURLError&) override;
 
   void DidBecomeReady(Status status);