Update from https://crrev.com/320343

cc/resources/video_resource_updater.h

Index: cc/resources/video_resource_updater.h
diff --git a/cc/resources/video_resource_updater.h b/cc/resources/video_resource_updater.h
index 1bccf79fd951157c9465431887b09e6005de0127..df9951a86ca96ae3683e07bcd5475bd6f5f18258 100644
--- a/cc/resources/video_resource_updater.h
+++ b/cc/resources/video_resource_updater.h
@@ -61,13 +61,13 @@ class CC_EXPORT VideoFrameExternalResources {
   ~VideoFrameExternalResources();
 };
 
-// VideoResourceUpdater is by the video system to produce frame content as
+// VideoResourceUpdater is used by the video system to produce frame content as
 // resources consumable by the compositor.
 class CC_EXPORT VideoResourceUpdater
     : public base::SupportsWeakPtr<VideoResourceUpdater> {
  public:
-  explicit VideoResourceUpdater(ContextProvider* context_provider,
-                                ResourceProvider* resource_provider);
+  VideoResourceUpdater(ContextProvider* context_provider,
+                       ResourceProvider* resource_provider);
   ~VideoResourceUpdater();
 
   VideoFrameExternalResources CreateExternalResourcesFromVideoFrame(