Update all float attributes in HTMLMediaElement and related objects to double

Source/WebCore/html/track/TextTrackCue.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2012, 2013 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 129 matching lines @@
     void setRegionId(const String&);
 #endif
 
     bool isActive();
     void setIsActive(bool);
 
     bool hasDisplayTree() const { return m_displayTree; }
     PassRefPtr<TextTrackCueBox> getDisplayTree(const IntSize& videoSize);
     PassRefPtr<HTMLDivElement> element() const { return m_cueBackgroundBox; }
 
-    void updateDisplayTree(float);
+    void updateDisplayTree(double);
     void removeDisplayTree();
     void markFutureAndPastNodes(ContainerNode*, double, double);
 
     int calculateComputedLinePosition();
 
     virtual const AtomicString& interfaceName() const;
     virtual ScriptExecutionContext* scriptExecutionContext() const;
 
     std::pair<double, double> getCSSPosition() const;
 
@@ skipping 116 matching lines @@
     std::pair<float, float> m_displayPosition;
 #if ENABLE(WEBVTT_REGIONS)
     String m_regionId;
 #endif
 };
 
 } // namespace WebCore
 
 #endif
 #endif