Add use counters for VTTCue use/rendering and its attributes

Source/core/html/track/vtt/VTTCue.cpp

 /*
  * Copyright (c) 2013, Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 #include "core/html/track/vtt/VTTCue.h"
 
 #include "CSSPropertyNames.h"
 #include "CSSValueKeywords.h"
 #include "RuntimeEnabledFeatures.h"
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/events/Event.h"
+#include "core/frame/UseCounter.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/track/TextTrack.h"
 #include "core/html/track/TextTrackCueList.h"
 #include "core/html/track/vtt/VTTElement.h"
 #include "core/html/track/vtt/VTTParser.h"
 #include "core/html/track/vtt/VTTRegionList.h"
 #include "core/html/track/vtt/VTTScanner.h"
 #include "core/rendering/RenderVTTCue.h"
 #include "platform/text/BidiResolver.h"
 #include "platform/text/TextRunIterator.h"
@@ skipping 159 matching lines @@
     , m_cueAlignment(Middle)
     , m_vttNodeTree(nullptr)
     , m_cueBackgroundBox(HTMLDivElement::create(document))
     , m_displayDirection(CSSValueLtr)
     , m_displaySize(undefinedSize)
     , m_snapToLines(true)
     , m_displayTreeShouldChange(true)
     , m_notifyRegion(true)
 {
     ScriptWrappable::init(this);
+    UseCounter::count(document, UseCounter::VTTCue);
 }
 
 VTTCue::~VTTCue()
 {
     // FIXME: This is scary, we should make the life cycle smarter so the destructor
     // doesn't need to do DOM mutations.
     if (m_displayTree)
         m_displayTree->remove(ASSERT_NO_EXCEPTION);
 }
 
@@ skipping 523 matching lines @@
         if (region)
             region->willRemoveVTTCueBox(m_displayTree.get());
     }
 
     if (m_displayTree)
         m_displayTree->remove(ASSERT_NO_EXCEPTION);
 }
 
 void VTTCue::updateDisplay(const IntSize& videoSize, HTMLDivElement& container)
 {
+    UseCounter::count(document(), UseCounter::VTTCueRender);
+
+    if (m_writingDirection != Horizontal)
+        UseCounter::count(document(), UseCounter::VTTCueRenderVertical);
+
+    if (!m_snapToLines)
+        UseCounter::count(document(), UseCounter::VTTCueRenderSnapToLinesFalse);
+
+    if (m_linePosition != undefinedPosition)
+        UseCounter::count(document(), UseCounter::VTTCueRenderLineNotAuto);
+
+    if (m_textPosition != 50)
+        UseCounter::count(document(), UseCounter::VTTCueRenderPositionNot50);
+
+    if (m_cueSize != 100)
+        UseCounter::count(document(), UseCounter::VTTCueRenderSizeNot100);
+
+    if (m_cueAlignment != Middle)
+        UseCounter::count(document(), UseCounter::VTTCueRenderAlignNotMiddle);
+
     RefPtr<VTTCueBox> displayBox = getDisplayTree(videoSize);
     VTTRegion* region = 0;
     if (track()->regions())
         region = track()->regions()->getRegionById(regionId());
 
     if (!region) {
         // If cue has an empty text track cue region identifier or there is no
         // WebVTT region whose region identifier is identical to cue's text
         // track cue region identifier, run the following substeps:
         if (displayBox->hasChildren() && !container.contains(displayBox.get())) {
@@ skipping 287 matching lines @@
     ASSERT(m_cueBackgroundBox);
     return m_cueBackgroundBox->document();
 }
 
 void VTTCue::trace(Visitor* visitor)
 {
     TextTrackCue::trace(visitor);
 }
 
 } // namespace WebCore