Remove using directives ("using namespace x") from renderer/core/html/track/.

Bug: 82078
Change-Id: I27457fb30c8f78060cdcc2bfdae18fd5d78c3920
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1870048
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: srirama chandra sekhar <srirama.m@samsung.com>
Cr-Commit-Position: refs/heads/master@{#707729}

third_party/blink/renderer/core/html/track/html_track_element.cc

@@ -40,8 +40,6 @@
 
 namespace blink {
 
-using namespace html_names;
-
 static String UrlForLoggingTrack(const KURL& url) {
   static const unsigned kMaximumURLLengthForLogging = 128;
 
@@ -51,7 +49,7 @@ static String UrlForLoggingTrack(const KURL& url) {
 }
 
 HTMLTrackElement::HTMLTrackElement(Document& document)
-    : HTMLElement(kTrackTag, document),
+    : HTMLElement(html_names::kTrackTag, document),
       load_timer_(document.GetTaskRunner(TaskType::kNetworking),
                   this,
                   &HTMLTrackElement::LoadTimerFired) {
@@ -83,13 +81,13 @@ void HTMLTrackElement::RemovedFrom(ContainerNode& insertion_point) {
 void HTMLTrackElement::ParseAttribute(
     const AttributeModificationParams& params) {
   const QualifiedName& name = params.name;
-  if (name == kSrcAttr) {
+  if (name == html_names::kSrcAttr) {
     ScheduleLoad();
 
     // 4.8.10.12.3 Sourcing out-of-band text tracks
     // As the kind, label, and srclang attributes are set, changed, or removed,
     // the text track must update accordingly...
-  } else if (name == kKindAttr) {
+  } else if (name == html_names::kKindAttr) {
     AtomicString lower_case_value = params.new_value.LowerASCII();
     // 'missing value default' ("subtitles")
     if (lower_case_value.IsNull())
@@ -99,11 +97,11 @@ void HTMLTrackElement::ParseAttribute(
       lower_case_value = TextTrack::MetadataKeyword();
 
     track()->SetKind(lower_case_value);
-  } else if (name == kLabelAttr) {
+  } else if (name == html_names::kLabelAttr) {
     track()->SetLabel(params.new_value);
-  } else if (name == kSrclangAttr) {
+  } else if (name == html_names::kSrclangAttr) {
     track()->SetLanguage(params.new_value);
-  } else if (name == kIdAttr) {
+  } else if (name == html_names::kIdAttr) {
     track()->SetId(params.new_value);
   }
 
@@ -115,7 +113,7 @@ const AtomicString& HTMLTrackElement::kind() {
 }
 
 void HTMLTrackElement::setKind(const AtomicString& kind) {
-  setAttribute(kKindAttr, kind);
+  setAttribute(html_names::kKindAttr, kind);
 }
 
 LoadableTextTrack* HTMLTrackElement::EnsureTrack() {
@@ -131,7 +129,7 @@ TextTrack* HTMLTrackElement::track() {
 }
 
 bool HTMLTrackElement::IsURLAttribute(const Attribute& attribute) const {
-  return attribute.GetName() == kSrcAttr ||
+  return attribute.GetName() == html_names::kSrcAttr ||
          HTMLElement::IsURLAttribute(attribute);
 }
 
@@ -169,7 +167,7 @@ void HTMLTrackElement::LoadTimerFired(TimerBase*) {
   DVLOG(TRACK_LOG_LEVEL) << "loadTimerFired";
 
   // 7. [X] Let URL be the track URL of the track element.
-  KURL url = GetNonEmptyURLAttribute(kSrcAttr);
+  KURL url = GetNonEmptyURLAttribute(html_names::kSrcAttr);
 
   // Whenever a track element has its src attribute set, changed,
   // or removed, the user agent must immediately empty the

third_party/blink/renderer/core/html/track/vtt/vtt_parser.cc

@@ -52,8 +52,6 @@
 
 namespace blink {
 
-using namespace html_names;
-
 const unsigned kFileIdentifierLength = 6;
 const unsigned kRegionIdentifierLength = 6;
 const unsigned kStyleIdentifierLength = 5;
@@ -608,7 +606,7 @@ void VTTTreeBuilder::ConstructTreeFromToken(Document& document) {
       child->SetTrack(track_);
 
       if (!token_.Classes().IsEmpty())
-        child->setAttribute(kClassAttr, token_.Classes());
+        child->setAttribute(html_names::kClassAttr, token_.Classes());
 
       if (node_type == kVTTNodeTypeVoice) {
         child->setAttribute(VTTElement::VoiceAttributeName(),