Drop all timeline seeks outside of the seekable range.

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 19 matching lines @@
 #include "config.h"
 #include "core/html/shadow/MediaControlElements.h"
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/DOMTokenList.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/MouseEvent.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/MediaController.h"
+#include "core/html/TimeRanges.h"
 #include "core/html/shadow/MediaControls.h"
 #include "core/html/track/TextTrack.h"
 #include "core/html/track/vtt/VTTRegionList.h"
 #include "core/page/EventHandler.h"
 #include "core/rendering/RenderMediaControlElements.h"
 #include "core/rendering/RenderSlider.h"
 #include "core/rendering/RenderTheme.h"
 #include "core/rendering/RenderVideo.h"
 #include "platform/RuntimeEnabledFeatures.h"
 
@@ skipping 361 matching lines @@
 
     MediaControlInputElement::defaultEventHandler(event);
 
     if (event->type() == EventTypeNames::mouseover || event->type() == EventTypeNames::mouseout || event->type() == EventTypeNames::mousemove)
         return;
 
     double time = value().toDouble();
     if (event->type() == EventTypeNames::input) {
         // FIXME: This will need to take the timeline offset into consideration
         // once that concept is supported, see https://crbug.com/312699
-        if (mediaElement().controller())
-            mediaElement().controller()->setCurrentTime(time);
-        else
+        if (mediaElement().controller()) {
+            if (mediaElement().controller()->seekable()->contain(time))
+                mediaElement().controller()->setCurrentTime(time);
+        } else if (mediaElement().seekable()->contain(time)) {
             mediaElement().setCurrentTime(time, IGNORE_EXCEPTION);
+        }
     }
 
     RenderSlider* slider = toRenderSlider(renderer());
     if (slider && slider->inDragMode())
         mediaControls().updateCurrentTimeDisplay();
 }
 
 bool MediaControlTimelineElement::willRespondToMouseClickEvents()
 {
     return inDocument() && document().isActive();
@@ skipping 335 matching lines @@
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
 }
 
 // ----------------------------
 
 } // namespace blink